Error Messages

Error #	Symbolic Constant	Error Message	Description
1001	CPXERR_NO_MEMORY	Out of memory	The computer has insufficient memory available to complete the selected operation. Downsize problem or increase the amount of physical memory available. Depending on the command, several memory conserving corrections can be made.
1002	CPXERR_NO_ENVIRONMENT	No environment	Be sure to pass a valid environment pointer to the routines.
1003	CPXERR_BAD_ARGUMENT	Bad argument	An invalid argument was passed.
1004	CPXERR_NULL_POINTER	Null pointer for required data	A value of NULL passed to a routine where NULL is not allowed.
1005	CPXERR_POINTER_MISMATCH	Pointer mismatch prevents memory reallocation	The pointers passed within CPXreallocprob() don't match those of original problem.
1007	CPXERR_POSITIVE_SPACE	Space allocated for a problem must be positive	Space argument to a problem load routine, or CPXreallocprob() , must be positive.
1008	CPXERR_MEMORY_MODEL	Not valid for problem memory model	The called routine requires a problem created via CPXcreateprob() , and the problem was created with a problem load routine, or vice versa.
1009	CPXERR_NO_PROBLEM	No problem exists	The requested command cannot be executed because no problem has been loaded.
1012	CPXERR_LIMITS_TOO_BIG	Problem size limits too large	One of the problem dimensions or read limits requires an array length beyond the architectural maximum of the computer.
1013	CPXERR_BAD_PARAM_NUM	Bad parameter number to CPLEX parameter routine	The CPLEX parameter number does not exist.
1014	CPXERR_PARAM_TOO_SMALL	Parameter value too small	CPLEX parameter value outside of range of possible values.
1015	CPXERR_PARAM_TOO_BIG	Parameter value too big	CPLEX parameter value outside of range of possible values.
1016	CPXERR_PROMOTION_VERSION	Promotional version. Problem size limits exceeded	The current problem size is too large for your version of CPLEX. Reduce problem size.
1017	CPXERR_NOT_FOR_MIP	Not available for mixed-integer problems	The requested operation can not be performed for mixed integer programs. Change problem type.
1018	CPXERR_NOT_FOR_QP	Not available for quadratic programs	The requested operation can not be performed for quadratic programs. Change problem type.
1019	CPXERR_CHILD_OF_CHILD	Cannot clone a cloned environment	CPXparenv() cannot be called from a child thread.
1020	CPXERR_TOO_MANY_THREADS	Thread limit exceeded	The maximum number of cloned threads has been exceeded.
1021	CPXERR_CANT_CLOSE_CHILD	Cannot close a child environment	It is not permitted to call CPXcloseCPLEX() on a child environment.
1022	CPXERR_BAD_PROB_TYPE	Unknown problem type. Problem not changed	CPXchgprobtype() could not change the problem type since an unknown type was specified.
1023	CPXERR_NOT_ONE_PROBLEM	Not a single problem, relaxed or fixed	No problem available, or problem is relaxed or fixed, and operation is inappropriate for those types of problems.
1024	CPXERR_NOT_MIPCLASS	Not a MIP, relaxed MIP, or fixed MIP	Function requires that MIP data exist for the problem passed in.
1025	CPXERR_NOT_QPCLASS	Not a QP or zeroed QP	Function requires that QP data exist for the problem passed in.
1026	CPXERR_STR_PARAM_TOO_LONG	String parameter is too long	String length greater than 512
1051	CPXERR_MSG_NO_CHANNEL	No channel pointer supplied to message routine	No channel pointer supplied to message routine.
1052	CPXERR_MSG_NO_FILEPTR	No file pointer found for message routine	No file pointer found for message routine.
1053	CPXERR_MSG_NO_FUNCTION	No function pointer found for message routine	No function pointer found for message routine.
1100	CPXERR_BOUNDS_INFEAS	Bounds on '%s' contradictory	Check upper and lower bounds for the specified variable.
1101	CPXERR_PRESLV_INForUNBD	Presolve determines problem is infeasible or unbounded	The loaded problem contains blatant infeasibilities or unboundedness.
1103	CPXERR_PRESLV_NO_PROB	No presolved problem created	Most likely insufficient memory exists to complete the loading of the presolved problem.
1106	CPXERR_PRESLV_ABORT	Aborted during presolve	User halted presolve via callback.
1107	CPXERR_PRESLV_BASIS_MEM	Not enough memory to build basis for original LP	Insufficient memory exists to complete the uncrushing of the presolved problem.
1108	CPXERR_PRESLV_COPYSOS	Can't load SOS info from original MIP	CPLEX's call to CPXloadsos() failed.
1109	CPXERR_PRESLV_COPYORDER	Can't load priority order info from original MIP	CPLEX's call to CPXloadorder() failed.
1110	CPXERR_PRESLV_SOLN_MIP	Not enough memory to recover solution for original MIP	Most likely insufficient memory exists to complete the uncrushing of the presolved problem.
1111	CPXERR_PRESLV_SOLN_QP	Not enough memory to compute solution to original QP	Most likely insufficient memory exists to complete the uncrushing of the presolved problem.
1112	CPXERR_PRESLV_START_LP	Not enough memory to build start for original LP	Most likely insufficient memory exists to complete the uncrushing of the presolved problem.
1114	CPXERR_PRESLV_FAIL_BASIS	Could not load unpresolved basis for original LP	Most likely insufficient memory exists to complete the uncrushing of the presolved problem.
1115	CPXERR_PRESLV_NO_BASIS	Failed to find basis in presolved LP	A basis could not be recovered during uncrushing most likely due to lack of memory.
1116	CPXERR_PRESLV_COPYMIPSTAT	Can't copy MIP start info from original MIP	Most likely insufficient memory exists to complete the presolve step.
1200	CPXERR_INDEX_RANGE	Index is outside range of valid values	Selected index is too large or small.
1201	CPXERR_COL_INDEX_RANGE	Column index %d out of range	The specified column index is negative or greater than or equal to the number of columns in the currently loaded problem.
1202	CPXERR_COL_NEW_INDEX_RANGE	New column %d has invalid index %d	The added column includes a row number which is negative or is greater than or equal to the number of rows in the problem matrix.
1203	CPXERR_ROW_INDEX_RANGE	Row index %d out of range	The specified row index is negative or greater than or equal to the number of rows in the currently loaded problem.
1204	CPXERR_ROW_NEW_INDEX_RANGE	New row %d has invalid index %d	The added row includes a column number which is negative or is greater than or equal to the number of columns in the current problem matrix.
1205	CPXERR_INDEX_RANGE_LOW	%s: 'begin' value %d is less than %d	The index in the query routine is too small.
1206	CPXERR_INDEX_RANGE_HIGH	%s: 'end' value %d is greater than %d	The index in the query routine is too large.
1207	CPXERR_NEGATIVE_SURPLUS	Insufficient array length	Array is too short to hold requested data.
1208	CPXERR_ARRAY_TOO_LONG	Array length too long	The number of norm values passed to CPXcopypnorms() or CPXcopydnorms() exceeds the number of columns or rows, respectively.
1209	CPXERR_NAME_CREATION	Unable to create default names	The current names of rows or columns don't allow the creation of default names.
1210	CPXERR_NAME_NOT_FOUND	Name not found	Name does not exist. Check CPXgetcolindex() or CPXrowindex() arguments.
1211	CPXERR_NO_RHS_IN_OBJ	'rhs' has no coefficient in 'obj'	You cannot make changes to the right-hand side of an objective row since no coefficients exist.
1214	CPXERR_CANT_REALLOC_RIMS	Cannot reallocate problem with rim data	CPXreallocprob() cannot realloc rims. Unload and reload the problem.
1215	CPXERR_BAD_SENSE	Illegal sense '%c'	Legal sense symbols are L, G, E and R.
1216	CPXERR_NO_RNGVAL	No range values	No ranges exist for this problem.
1217	CPXERR_NO_SOLN	No solution exists	The requested command cannot be executed because no solution exists for the problem. Optimize the problem first.
1218	CPXERR_NO_RIM	No rim vectors	No rim exists for this problem.
1219	CPXERR_NO_NAMES	No names exist	The requested operation is successful only if names have been assigned. Typically this failure occurs when reading a file, such as an ORD file, when no names were assigned during the prior call to CPXloadprob().
1220	CPXERR_NO_OBJ_NAME	Must have objective name	Objective function must have a name assigned, in order to use REVISE format.
1221	CPXERR_NOT_FIXED	Only fixed variables are pivoted out	CPXpivotout() can pivot out only fixed variables.
1222	CPXERR_DUP_ENTRY	Duplicate entry	In CPXchgcoeflist(), a duplicate (row, column) pair was found.
1251	CPXERR_INDEX_NOT_BASIC	Index must correspond to a basic variable	The requested variable is not basic.
1252	CPXERR_NEED_OPT_SOLN	Optimal solution required	An optimal solution must exist before the requested operation can be performed.
1253	CPXERR_BAD_STATUS	Invalid status for basis specification	The basis status values are out of range.
1254	CPXERR_NOT_UNBOUNDED	Unbounded solution required	The requested operation can only be performed on a problem determined to be unbounded.
1255	CPXERR_SBASE_INCOMPAT	Incompatible with superbasis	The requested operation is incompatible with an existing superbasis.
1256	CPXERR_SINGULAR	Basis singular	CPLEX cannot factorize a singular basis. See the discussion of numerical difficulties in the CPLEX User's Manual.
1257	CPXERR_PRIIND	Incorrect usage of pricing indicator	Pricing indicator value out of range.
1258	CPXERR_NO_LU_FACTOR	No LU factorization exists	The requested item requires the presence of a factorization. You may need to optimize with a 0 iteration limit to get a factorization.
1260	CPXERR_NO_SENSIT	Sensitivity analysis not available for current status	Sensitivity information is not available because an optimal basic solution does not exist for the currently loaded problem. Optimize the problem checking to ensure that it is not infeasible or unbounded.
1261	CPXERR_NO_BASIC_SOLN	No basic solution exists	The requested operation requires the existence of a basic solution. Apply primal or dual simplex or crossover.
1262	CPXERR_NOBASIS	No basis exists	The requested operation requires the existence of a basis.
1263	CPXERR_ABORT_STRONGBRANCH	Strong branching aborted	Strong branching, for variable selection, could not proceed because a subproblem optimization was aborted.
1264	CPXERR_NO_NORMS	No norms available	Norms not present. Change pricing and call the optimization routine.
1265	CPXERR_NOT_DUAL_UNBOUNDED	Dual unbounded solution required	The called function requires that the LP stored in the problem object has been determined to be unbounded by the dual simplex algorithm.
1290	CPXERR_NET_SMALL	Network too small	No significant network could be extracted from the problem.
1291	CPXERR_NET_IMBALANCE	Supplies and demands do not balance	Modify network formulation so that supplies and demands in the network portion of the problem match.
1292	CPXERR_BAD_METHOD	Invalid choice of optimization method	Unknown method selected for CPXhybnetopt() or CPXhybbaropt(). Select one of 'd' or 'p'.
1401	CPXERR_NO_SPACE	Not enough space	Insufficient space exists to add specified constraints or variables, or insufficient space is allocated to hold new columns or rows specified within a REV file.
1402	CPXERR_NO_SPACE_FREE	Not enough space to add free rows	Insufficient space exists to add specified constraints or variables, or insufficient space is allocated to hold new columns or rows specified within a REV file.
1403	CPXERR_NO_SPACE_FREE_NZ	Not enough space for free row nonzeros	Insufficient space exists to add specified constraints or variables, or insufficient space is allocated to hold new columns or rows specified within a REV file.
1404	CPXERR_NO_SPACE_FREE_NAM	Not enough space for free row names	Insufficient space exists to add specified constraints or variables, or insufficient space is allocated to hold new columns or rows specified within a REV file.
1406	CPXERR_NO_SPACE_NAMES	Names need space for %d characters, only %d available	Reload problem, increasing the size of the arrays for names.
1421	CPXERR_NO_FILENAME	File name not specified	A filename must be specified for the requested operation to succeed.
1422	CPXERR_FAIL_OPEN_WRITE	Could not open file '%s' for writing	CPLEX could not create the specified file. Check the file specification.
1423	CPXERR_FAIL_OPEN_READ	Could not open file '%s' for reading	CPLEX could not read the specified file. Check the file specification.
1424	CPXERR_BAD_FILETYPE	Invalid filetype	Invalid file type passed to routine requiring a file type
1431	CPXERR_TOO_MANY_ROWS	Too many rows	The problem contains more rows than are allowed.
1432	CPXERR_TOO_MANY_COLS	Too many columns	The problem contains more matrix coefficients than are allowed.
1433	CPXERR_TOO_MANY_COEFFS	Too many coefficients	The problem contains more columns than are allowed.
1434	CPXERR_BAD_NUMBER	Line %d: Couldn't convert '%s' to a number	CPLEX was unable to interpret a string entry as a number on the indicated line.
1435	CPXERR_BAD_EXPO_RANGE	Line %d: Exponent '%s' out of range	An exponent on the indicated line is greater than the largest permitted for your computer system.
1436	CPXERR_NO_OBJ_SENSE	Max or Min missing	The objective function sense indicator is missing from the LP file. No problem is read.
1441	CPXERR_NO_NAME_SECTION	Line %d: No NAME section	The required MPS file NAME section is missing.
1442	CPXERR_BAD_SOS_TYPE	Line %d: Unrecognized SOS type: %c%c	Only SOS Types S1 or S2 can be specified within an SOS or MPS file.
1443	CPXERR_COL_ROW_REPEATS	Column '%s' has repeated row '%s'	The indicated column appears more than once in a row. Check the MPS file for duplicate entries.
1444	CPXERR_RIM_ROW_REPEATS	%s '%s' has repeated row '%s'	The MPS file contains duplicate row names.
1445	CPXERR_ROW_REPEATS	Row '%s' repeats	The MPS problem or REV file contains duplicate row entries. Inspect and edit the file. If the error occurred during the reading of a REV file the problem must be reloaded.
1446	CPXERR_COL_REPEATS	Column '%s' repeats	The MPS problem or REV file contains duplicate column entries. Inspect and edit the file. If the error occurred during the reading of a REV file the problem must be reloaded.
1447	CPXERR_RIM_REPEATS	Line %d: %s '%s' repeats	The MPS file contains duplicate names.
1448	CPXERR_ROW_UNKNOWN	Line %d: '%s' is not a row name	The MPS or REV file specifies a row name that does not exist.
1449	CPXERR_COL_UNKNOWN	Line %d: '%s' is not a column name	The MPS or REV file specifies a column name that does not exist.
1450	CPXERR_RHS_UNKNOWN	Line %d: '%s' is not a RHS name	The REV file specifies a RHS name that does not exist.
1451	CPXERR_BOUND_UNKNOWN	Line %d: '%s' is not a bound name	The REV file specifies a bound name that does not exist.
1452	CPXERR_RANGE_UNKNOWN	Line %d: '%s' is not a range name	The REV file specifies a range that does not exist.
1453	CPXERR_NO_ROW_SENSE	Line %d: No row sense	No sense indicator was found on the indicated line. If this error appears in a REV file the problem must be reloaded.
1454	CPXERR_EXTRA_FX_BOUND	Line %d: 'FX' bound type illegal when prior bound given	A column with either an upper or lower bound previously assigned has an illegal FX bound assignment. Since the FX bound type fixes both upper and lower bounds, no additional bounds can be specified. Check the MPS file.
1455	CPXERR_EXTRA_FR_BOUND	Line %d: 'FR' bound type illegal when prior bound given	A column with an upper or lower bound previously assigned has an illegal FR bound assignment. Since the FR bound type has neither an upper nor lower bound, no other bound type can be specified. Check the MPS file.
1456	CPXERR_EXTRA_BV_BOUND	Line %d: 'BV' bound type illegal when prior bound given	Check the MPS file for bound values which conflict with this type specification.
1457	CPXERR_BAD_BOUND_TYPE	Line %d: Unrecognized bound type '%s'	An unrecognized bounds sense indicator appears in the MPS file. Acceptable bound senses are BV, LI, UI, UP, LO, FX, FR, MI and PL.
1458	CPXERR_UP_BOUND_REPEATS	Line %d: Repeated upper bound	The upper bound for a column is repeated within the problem file on the indicated line. Two individual upper bounds could exist. Alternately, a PL bound and individual bound could be in conflict. Check the MPS file.
1459	CPXERR_LO_BOUND_REPEATS	Line %d: Repeated lower bound	The lower bound for a column is repeated within the problem file on the indicated line. Two individual lower bounds could exist. Alternately, an MI bound and individual lower bound could be in conflict. Check the MPS file.
1460	CPXERR_NO_BOUND_TYPE	Line %d: Bound type missing	No bound type could be found for the indicated column bound on the indicated line. Check the MPS file.
1461	CPXERR_NO_QMATRIX_SECTION	Line %d: No QMATRIX section	The required QMATRIX section for quadratic programs is missing from the MPS file. Check the file.
1462	CPXERR_BAD_SECTION_ENDATA	Line %d: Unrecognized section indicator. Expecting ENDATA	An unrecognized MPS file section indicator after the COLUMNS section of the MPS file.
1463	CPXERR_NAME_TOO_LONG	Line %d: Identifier/name too long to process	A number has been read that is larger than the biggest integer value that can be represented by the computer.
1464	CPXERR_INT_TOO_BIG_INPUT	Line %d: Magnitude exceeds integer limit	The length of the identifier or name was beyond the size CPLEX can process.
1471	CPXERR_NO_ROWS_SECTION	Line %d: No ROWS section	No ROW section was found in the MPS file.
1472	CPXERR_NO_COLUMNS_SECTION	Line %d: No COLUMNS section	The required COLUMNS section is missing from the MPS file. Check the file.
1473	CPXERR_BAD_SECTION_BOUNDS	Line %d: Unrecognized section indicator. Expecting RANGES, BOUNDS, QMATRIX, or ENDATA	An unrecognized MPS file section indicator after the COLUMNS section of the MPS file.
1474	CPXERR_RANGE_SECTION_ORDER	Line %d: 'RANGES' section out of order	The RANGES section can only appear after the RHS section in an MPS file.
1475	CPXERR_BAD_SECTION_QMATRIX	Line %d: Unrecognized section indicator. Expecting QMATRIX or ENDATA	An unrecognized MPS file section indicator after the RHS or BOUNDS section of the MPS file.
1476	CPXERR_NO_OBJECTIVE	Line %d: No objective row found	No free row was found in the MPS file. Check the file. At least one free row must be present. Free rows have an 'N' sense beginning in column 2.
1477	CPXERR_ROW_REPEAT_PRINT	%d Row repeats messages not printed	The MPS problem or REV file contains duplicate row entries. Inspect and edit the file.
1478	CPXERR_COL_REPEAT_PRINT	%d Column repeats messages not printed	The MPS problem or REV file contains duplicate column entries. Inspect and edit the file.
1479	CPXERR_RIMNZ_REPEATS	Line %d: %s %s repeats	The MPS file contains duplicate entries in an extra rim vector.
1480	CPXERR_EXTRA_INTORG	Line %d: 'INTORG' found while reading integers	Integer markers are incorrectly positioned in the MPS file.
1481	CPXERR_EXTRA_INTEND	Line %d: 'INTEND' found while not reading integers	Integer markers are incorrectly positioned in the MPS file.
1482	CPXERR_EXTRA_SOSORG	Line %d: 'SOSORG' found while reading a SOS	SOS markers are incorrectly positioned in the MPS file.
1483	CPXERR_EXTRA_SOSEND	Line %d: 'SOSEND' found while not reading a SOS	SOS markers are incorrectly positioned in the MPS file.
1484	CPXERR_TOO_MANY_RIMS	Too many rim vectors	Reset the rim vector read limit to a larger number.
1485	CPXERR_TOO_MANY_RIMNZ	Too many rim nonzeros	Reset the rim vector nonzero read limit to a larger number.
1486	CPXERR_NO_ROW_NAME	Line %d: No row name	A row name is missing within the ROWS section.
1487	CPXERR_BAD_OBJ_SENSE	Line %d: Unrecognized objective sense '%s'	There is an OBJSENSE line in an MPS problem file, but CPLEX can not locate the MIN or MAX objective sense statement. Check the MPS file for correct syntax. See the CPLEX User's Manual for a description of MPS format.
1501	CPXERR_REV_INDICATOR	Line %d: Revision control indicator missing	The control indicator record is missing in the REV file.
1502	CPXERR_REV_REPEATS	Line %d: Repeated revision of '%s'	The REV file contains multiple revisions of a type that can only be made once, such as a deletion.
1503	CPXERR_REV_OBJROW_ILLEG	Line %d: Revision of objective row illegal	The REV file includes instructions to modify the objective function. CPLEX does not support this operation.
1504	CPXERR_REV_SEN_N_ILLEG	Line %d: Modification to or from sense 'N' illegal	CPLEX does not support selecting a new objective function nor deleting the current objective function via a REV file.
1505	CPXERR_REV_EXTRA_RIM	Line %d: More than %d extra rim vectors	The REV file contains more than the maximum number of rim vectors.
1506	CPXERR_REV_RIM_NAMES	Rim names need space for %d characters, only %d available	Insufficient space is allocated to hold the names of rim vectors.
1507	CPXERR_REV_DELRHS_ILLEG	Line %d: Deletion of active RHS illegal	The REV file includes instructions to delete the active RHS. CPLEX does not support this operation.
1508	CPXERR_REV_RHS_COEFF	Line %d: More than %d new RHS coefficients	The REV file contains more than the maximum number of coefficients.
1509	CPXERR_REV_DELRNG_ILLEG	Line %d: Deletion of active range illegal	The REV file includes instructions to delete the active range vector. CPLEX does not support this operation.
1510	CPXERR_REV_RANGE_COEFF	Line %d: More than %d range coefficients	The REV file contains more than the maximum number of range coefficients.
1511	CPXERR_REV_NO_RANGES	No active ranges loaded. Range revision illegal	No ranges exist to be modified.
1512	CPXERR_REV_DELBND_ILLEG	Line %d: Deletion of active bound illegal	The REV file includes instructions to delete the active bound vector. CPLEX does not support this operation.
1513	CPXERR_REV_BIN_UB	Line %d: Non-one bound on binary variable	The REV file contains an upper bound for a binary variable not equal to 1.
1514	CPXERR_REV_BND_COEFF	More than %d coefficients during extra bound '%s' processing	Insufficient extra space was set aside to hold revision data. Increase the amount of "extra space" in the problem read limits before reading the problem.
1515	CPXERR_REV_RIM_COEFF	Space for %d extra rim nonzeros needed, only %d available	More space than is available is required to store extra nonzeros. Increase the amount of extra space allocated.
1516	CPXERR_REV_TOO_MANY_ROWS	Line %d: More than %d new rows	Too many new rows are added in the REV file.
1517	CPXERR_REV_TOO_MANY_COLS	Line %d: More than %d new columns	Too many new columns are added in the REV file.
1518	CPXERR_REV_TOO_MANY_NZS	Line %d: More than %d new coefficients	Too many new nonzero coefficients are added in the REV file.
1519	CPXERR_REV_TOO_MANY_RIMV	Line %d: More than %d new extra rim vectors	Reset the rim vector read limit to a larger number.
1532	CPXERR_BAD_ROW_ID	Incorrect row identifier	Selected row does not exist.
1533	CPXERR_DEMAND_BALANCE	Demands not balanced	Demands and supplies must balance in any network problem.
1537	CPXERR_BAD_CHAR	Illegal character	Character not allowed. See MPS or LP format descriptions.
1550	CPXERR_BAS_FILE_SHORT	Basis missing some basic variables	Number of basic variables is less than the number of rows.
1551	CPXERR_BAD_INDICATOR	Line %d: Unrecognized basis indicator '%s'	An invalid basis indicator appears in the BAS file.
1552	CPXERR_NO_ENDATA	'ENDATA' missing	BAS files must have an ENDATA record as the last line of the file.
1553	CPXERR_FILE_ENTRIES	Line %d: Wrong number of entries	The BAS or VEC file contains a line with too many entries.
1555	CPXERR_BAS_FILE_SIZE	%d %s basic variable(s)	Number of basic variables doesn't match the problem. Check CPXloadbase() call.
1560	CPXERR_NOT_SAV_FILE	'%s' is not a SAV file	The selected file does not match the type specified.
1561	CPXERR_SAV_FILE_DATA	Not enough data in SAV file	The file is corrupted or was generated by an incompatible version of the software.
1562	CPXERR_SAV_FILE_WRITE	Unable to write SAV file to disk	CPLEX could not open or write to the requested SAV file. Check the file designation and disk space.
1563	CPXERR_FILE_FORMAT	File '%s' has an incompatible format. Try setting 'reverse' flag	When reading a binary file produced on a different computer system, setting the reverse byte ordering may allow reading.
1602	CPXERR_ADJ_SIGNS	Lines %d,%d: Adjacent signs	The previous line ended with a "+" or a "-" and that the subsequent line must start with a variable name rather than an operator.
1603	CPXERR_RHS_IN_OBJ	Line %d: RHS sense in objective	The objective row erroneously includes a sense indicator.
1604	CPXERR_ADJ_SIGN_SENSE	Lines %d,%d: Adjacent sign and sense	A sense indicator erroneously follows an arithmetic operator.
1605	CPXERR_QUAD_IN_ROW	Line %d: Quadratic term in constraint	Quadratic terms are allowed only in the objective function.
1606	CPXERR_ADJ_SIGN_QUAD	Lines %d,%d: Adjacent sign and quadratic character	The previous line ended with a "+" or a "-" and that the subsequent line must start with a variable name rather than an one of the reserved quadratic characters []*^.
1607	CPXERR_NO_OPERATOR	Line %d: Expected operator, found '%c'	Some character other than an arithmetic operator appears between variable names on the indicated line.
1608	CPXERR_NO_OP_OR_SENSE	Line %d: Expected '+','-' or sense, found '%c'	Some character other than a + or - operator, as required, appears on the indicated line.
1609	CPXERR_NO_ID_FIRST	Line %d: Expected identifier first	A variable name is missing on the indicated line.
1610	CPXERR_NO_RHS_COEFF	Line %d: Expected RHS coefficient	No RHS coefficient is present after the sense indicator on the indicated line.
1611	CPXERR_NO_NUMBER_FIRST	Line %d: Expected number first	Some character other than a number, as required, appears on the indicated line.
1612	CPXERR_NO_QUAD_EXP	Line %d: Expected quadratic exponent	An exponent of 2 is expected after the ^ operator
1613	CPXERR_QUAD_EXP_NOT_2	Line %d: Quadratic exponent must be 2	Only an exponent of 2 is allowed after the exponentiation operator ^.
1614	CPXERR_NO_QP_OPERATOR	Line %d: Expected ^ or *	The ^ or * operator is missing from the QP term.
1615	CPXERR_NO_NUMBER	Line %d: Expected number, found '%c'	Some character other than a number, as required, appears on the indicated line.
1616	CPXERR_NO_ID	Line %d: Expected identifier, found '%c'	Instead of the expected identifier CPLEX found the character shown.
1617	CPXERR_BAD_ID	Line %d: '%s' not valid identifier	An illegal variable or row name exists on the indicated line.
1618	CPXERR_BAD_EXPONENT	Line %d: Exponent '%s' not %s with number	The characters following an exponent on the indicated line are not numbers.
1621	CPXERR_NO_BOUND_SENSE	Line %d: No bound sense	The sense indicator is missing on the indicated line.
1622	CPXERR_BAD_BOUND_SENSE	Line %d: Invalid bound sense	An invalid bounds sense indicator appears in the LP file. Acceptable bound senses are "<", ">", "=", or "free".
1623	CPXERR_NO_NUMBER_BOUND	Line %d: Missing bound number	The bound data is missing from the LP file. CPLEX expected a number where no number was found.
1624	CPXERR_LP_TOO_MANY_ROWS	Line %d: More than %d constraints	Extra space is insufficient. Increase extra space using read limits.
1625	CPXERR_LP_TOO_MANY_COLS	Line %d: More than %d variables	Extra space is insufficient. Increase extra space using read limits.
1626	CPXERR_LP_TOO_MANY_COEFFS	Line %d: More than %d coefficients	Extra space is insufficient. Increase extra space using read limits.
1650	CPXERR_INVALID_NUMBER	Number not representable in exponential notation	The number to be printed is not representable.
1701	CPXERR_IIS_NO_INFO	No iis information exists	The IIS algorithm found no IIS sets, so the CPXgetiis() routine fails. Callable Library users see this message if CPXgetiis() or CPXdisplayiis() is called before computing the IIS.
1702	CPXERR_IIS_NO_SOLN	No solution exists; infeasibility analysis not available	The requested command cannot be executed because no solution exists for the problem. Optimize the problem first.
1703	CPXERR_IIS_FEAS	Problem is feasible; no IIS available	The problem solved with indication of numerical uncertainty. It may be feasible.
1704	CPXERR_IIS_NOT_INFEAS	Problem may be feasible; no IIS available	The problem solved with indication of numerical uncertainty. It may be feasible.
1705	CPXERR_IIS_OPT_INFEAS	Problem optimal with unscaled infeasibilities. No IIS available	The problem solved with only unscaled infeasibilities. The IIS algorithm cannot be applied.
1706	CPXERR_IIS_DEFAULT	Unable to compute an iis	The problem solved with indication of numerical uncertainty. It may be feasible.
1707	CPXERR_IIS_NO_BASIC	Infeasibility Finder requires a basic solution	Primal or dual simplex or crossover from a barrier solution must first be used prior to applying the IIS algorithm.
1708	CPXERR_IIS_NO_PRIMAL	Infeasibility Finder requires an infeasible primal problem	No IIS can be determined if the dual algorithm finds the problem to be dual infeasible.
1709	CPXERR_IIS_NO_LOAD	Failed to load iis subproblem	Most likely there is insufficient memory to perform the IIS analysis.
1710	CPXERR_IIS_SUB_OBJ_LIM	Objective limit reached on iis subproblem	Indicated limit hit during the solution of a subproblem.
1711	CPXERR_IIS_SUB_IT_LIM	Iteration limit reached on iis subproblem	Indicated limit hit during the solution of a subproblem.
1712	CPXERR_IIS_SUB_TIME_LIM	Time limit reached on iis subproblem	Indicated limit hit during the solution of a subproblem.
1713	CPXERR_IIS_NUM_BEST	Unable to optimize iis subproblem	Status of subproblem optimization is unknown due to numerical uncertainty. Check scaling of problem.
3001	CPXERR_ALREADY_CTYPE	ctype array already loaded for lp	The routine CPXloadctype() failed because a ctype array has been previously loaded.
3002	CPXERR_BOUNDS_BINARY	Binary variable '%s' has value outside [0,1]	The referenced variable, type binary, has been assigned bounds outside of 0 and 1. Change the bounds to 0 and 1.
3003	CPXERR_NOT_MIP	Not a mixed-integer problem	The requested operation can only be performed on a mixed integer problem.
3004	CPXERR_SOS_BOUNDS	Infeasible bounds for set number %d	An SOS exists with variable having upper or lower bounds such that no feasible solution exists.
3006	CPXERR_BAD_PRIORITY	Negative priority, %d	Priority orders must be positive integer values.
3007	CPXERR_ORDER_BAD_DIRECTION	Illegal direction %d	Legal direction entries are limited to the values 0, 1, and 2.
3009	CPXERR_ARRAY_BAD_SOSTYPE	Illegal sostype %c	Only sostype values of 1 or 2 are legal.
3010	CPXERR_UNIQUE_WEIGHTS	Set does not have unique weights	SOS weights must be unique.
3011	CPXERR_BOUNDS_INT	Non-integral %s bound value %g for integer column '%s'	Check to be sure that bounds for integer variables have integer values.
3012	CPXERR_BAD_DIRECTION	Line %d: Unrecognized direction '%c%c'	Only UP and DN are accepted as branching directions beginning in column 2 of an ORD file.
3015	CPXERR_NO_SOS	No user-defined SOSs exist	SOS information can be written to a file only if already defined. SOS Type 3 information (found using the SOSSCAN feature) cannot be written to an SOS file.
3016	CPXERR_NO_ORDER	No priority order exists	The requested command cannot be executed because no priority order has been loaded.
3017	CPXERR_NO_INT_SOLN	No integer feasible solution exists	An integer feasible solution must exist before the requested operation can be performed.
3018	CPXERR_INT_TOO_BIG	Magnitude of variable %s: %g exceeds integer limit	CPXmipopt() tried to branch on the indicated integer variable at a value larger than representable in the branch-and-bound tree. Check model formulation.
3019	CPXERR_SUBPROB_SOLVE	Failure to solve MIP subproblem	CPXmipopt() failed to solve one of the subproblems in the branch-and-bound tree. This can be due to a limit (for example, an iteration limit) or numerical trouble. Check the log, or add a call to CPXgetsubstat() (in the Callable Library) for information on the cause.
3020	CPXERR_NO_MIPSTART	No MIP start exists	CPXgetmipstart() failed because no MIP start data is available for the problem.
3021	CPXERR_BAD_CTYPE	Illegal ctype '%c'	An illegal ctype character has been passed to CPXchgctype() . Use one of 'C', 'B' or 'I'.
3301	CPXERR_MISS_SOS_TYPE	Line %d: Missing SOS type	SOS type not specified.
3401	CPXERR_TRE_FILE_DATA	Not enough data in TRE file	The TRE file became corrupted.
3402	CPXERR_TRE_FILE_WRITE	Error on write to TRE file	The TRE file could not be written. Check available disk space.
3403	CPXERR_TRE_FILE_VERSION	Can't read TRE file written by CPLEX %s (Current version is %s)	The TRE file could not be interpreted and may be corrupted or produced by an incompatible prior version of CPLEX.
3404	CPXERR_TRE_FILE_OBJ	Objective names in TRE file %s do not match current problem	The problem being solved must match that at the time the TRE file was created.
3405	CPXERR_TRE_FILE_COLS	Tree in file %s does not match the current problem. Number of variables in TRE file: %d. Number of variables in current problem: %d	The problem being solved must match that at the time the TRE file was created.
3406	CPXERR_TRE_FILE_ROWS	Tree in file %s does not match the current problem. Number of constraints in TRE file: %d. Number of constraints in current problem: %d	The problem being solved must match that at the time the TRE file was created.
3407	CPXERR_TRE_FILE_INTS	Tree in file %s does not match the current problem. Number of integer variables in TRE file: %d. Number of integer variables in current problem: %d	The problem being solved must match that at the time the TRE file was created.
3408	CPXERR_TRE_FILE_NONZ	Tree in file %s does not match the current problem. Number of nonzeros in TRE file: %d. Number of nonzeros in current problem: %d	The problem being solved must match that at the time the TRE file was created.
3409	CPXERR_TRE_FILE_TYPES	Different type in TRE file %s for variable '%s'	The problem being solved must match that at the time the TRE file was created.
3410	CPXERR_TRE_FILE_PRESOLVE	Presolve settings for tree in file %s do not match the current settings	The presolve settings in effect at the time the TRE file was generated must match those at the time it is read.
3412	CPXERR_NO_TREE	Current problem has no tree	No tree exists until after the mixed integer optimization has begun.
3413	CPXERR_TREE_MEMORY_LIMIT	Tree memory limit exceeded	The reading of the tree file has stopped because the tree memory limit has been reached.
3414	CPXERR_TRE_FILE_FORMAT	File '%s' has an incompatible format	The TRE file was produced on a computer with a different byte ordering scheme.
3501	CPXERR_NODE_FILE_OPEN	Could not open node file	CPLEX failed to open a node file for updating.
3502	CPXERR_NODE_FILE_READ	Failure on node file read	CPLEX failed to read from a node file.
3503	CPXERR_NODE_FILE_WRITE	Failure on node file write	CPLEX failed to write to a node file.
3504	CPXERR_NODE_ON_DISK	No callback info on disk/compressed nodes	Information on nodes stored in node files is not available through the advanced callback functions.
3601	CPXERR_PTHREAD_MUTEX_INIT	Could not initialize mutex	A system call needed to initialize parallel MIP
3602	CPXERR_SUN_CONCURRENCY	Could not set concurrency level	The Solaris system call thr_setconcurrency() failed.
3603	CPXERR_PTHREAD_CREATE	Could not create thread	A system call needed to initialize parallel MIP failed.
4001	CPXERR_BARRIER_NUMERICAL	Unrecoverable error in barrier algorithm	Numerical problems prevent the Barrier algorithm from proceeding. Turn up logging to determine problem.
4003	CPXERR_BARRIER_AUG_SCHUR	Not enough memory to do augmented Schur complements	The computer has insufficient memory available to complete the selected operation. Downsize problem or increase the amount of physical memory available. Depending on the command, several memory conserving corrections can be made.
4004	CPXERR_BARRIER_NO_MEMORY	Not enough memory for barrier solve	The computer has insufficient memory available to complete the selected operation. Downsize problem or increase the amount of physical memory available. Depending on the command, several memory conserving corrections can be made.
5001	CPXERR_BAD_Q	Invalid quadratic matrix. Unequal off-diagonal components	The Q matrix must be symmetric.
5002	CPXERR_Q_NOT_POS_DEF	Q is not positive semi-definite	The Q matrix must be positive semi-definite (for minimizations) to apply the Barrier algorithm. Check the Q term.
5003	CPXERR_Q_NOT_MATRIX	Cannot change off-diagonal element of quadratic matrix loaded as separable	This routine does not support off diagonal modifications since the Q was loaded as separable.
5004	CPXERR_NOT_QP	Not a quadratic program	The requested operation can only be performed on a quadratic problem.
5006	CPXERR_Q_SEP_INDEF	Separable objective is indefinite	The Q matrix must be positive semi-definite (for minimizations) to apply the Barrier algorithm. Check the Q term.
5007	CPXERR_QP_BAD_BAR_ALG	Invalid barrier algorithm for quadratic programs	Only the default barrier algorithm can be used to solve QP problems.
5009	CPXERR_Q_NO_SPACE	Insufficient space in Q matrix	Insufficient space in the Q matrix exists to make the requested coefficient change.
5010	CPXERR_Q_NEG_ZERO_COMP	Q has negative or zero value diagonal components on %d quadratic variables	Every off diagonal term must also appear on the diagonal of the Q matrix and must be positive (for a minimization).
5011	CPXERR_Q_DUP_ENTRY	Duplicate entry for pair '%s' and '%s'	Duplicate entries for the quadratic term exist.
5012	CPXERR_Q_NOT_SYMMETRIC	Q is not symmetric	The Q matrix must be symmetric. Check off diagonal element.
32001		No license root file was found	No license directory pointer file was found. Check that the CPLEXLICENSE environment variable is properly set and that the pointer file is correct.
32002		No license directory name was found	The license directory pointer file does not contain a directory name.
32003		License directory name is not a directory	The specified license directory is not a directory. Check the pointer file.
32004		License directory not found	This can happen under the following conditions: a) A license is being deleted and the licensing directory is not found   b) The file /usr/lib/cplex.licdir exists and specifies a directory that does not exist.   c) The environment variable specifies a directory pointer file that contains the name of a directory that does not exist.
32005		No license root file was found	cpxlicense could not create the license directory pointer file. Check permissions.
32007		License directory cannot be created	This occurs in cpxlicense when the licensing directory specified in /usr/lib/cplex.licdir cannot be created, or the licensing directory specified in the directory pointer file contained in the environment variable CPLEXLICENSE cannot be created. This could also happen if the CPLEXLICENSE environment variable no longer identifies the directory pointer file. Check permissions or the setting of the CPLEXLICENSE environment variable.
32008		License file already exists	cpxlicense -n cannot overwrite an existing license.
32009		Host has an improper identifier	Illegal or impossible to maintain hostids are disallowed.
32010		Could not create initial license file	Some file system or permissions problem is keeping the license file from being created.
32011		Corrupted or nonexistent license file	This occurs whenever the licensing file in the license directory is checked, and it does not exist, or does not have the right number of characters in it. This can happen due to inappropriately specifying the CPLEXLICENSE environment variable, or the directory name that is present inside of the directory pointer file.
32012		No match in license	An error in entering the license code has occurred. Check entry.
32013		No match in license serial number	The serial number in the license does not match the serial number of the activated license, and indicates possible tampering. This can also happen if the user tries to copy licensing files on the same machine to a different directory. Delete the license and reinstall or perform a license restore operation.
32014		Environment variable specifies file that does not exist	This occurs when the user sets the environment variable CPLEXLICENSE to contain the name of a file that does not exist, or a file that the user cannot read due to permissions.
32015		License not valid for this host	When CPLEX is running, this message occurs when the license is not valid for the host it is running on. This can occur if certain machine configurations have been made. On personal computers using a license hardware key, this can mean that the key or cable is missing or inaccessible.
32016		Invalid serial number	In cpxlicense, if the user enters a license with a serial number that does not match that of the current license, this message is printed. This can only occur if cpxlicense has been run again before an activation code is obtained or if the user has copied or tampered with the initial license setup. The installation and setup process must be begun again after deleting the invalid license information using cpxlicense -d.
32017		Invalid encrypted license	In cpxlicense, if the user enters a license that makes no sense, it is rejected, and this message is printed. Usually a typographic error has been made. Retry inputting the code.
32018		Invalid application serial number	The runtime application serial number does not match.
32019		License directory cannot be deleted	This occurs in cpxlicense when the licensing directory specified in /usr/lib/cplex.licdir cannot be deleted, or the licensing directory specified in the directory pointer file contained in the environment variable CPLEXLICENSE cannot be deleted. This could also happen if the CPLEXLICENSE environment variable no longer identifies the directory pointer file. Check permissions or the setting of the CPLEXLICENSE environment variable.
32020		License has expired	Either the license has an invalid expiration date, or has expired.
32021		License not valid for this version	This happens when the user is licensed for an earlier version and is attempting to run on a later version. If maintenance and update service is paid, get a new license code. Otherwise, arrange for this service first and then get a new license code.
32022		License not valid for this group	The user is not a member of the Unix group required for this license.
32023		License not valid for this product	The license is not intended for the algorithm or product which is attempting to be activated. Examples include attempting to use the CPLEX Base system on a machine licensed for Derivative Work use or using MIP or Barrier algorithms without a license.
32024		Optimization algorithm not licensed	This happens if the user tries to call CPXmipoptimize() and MIP is not licensed, or CPXbaropt() or CPXhybbaropt() and Barrier is not licensed.
32025		Token file missing	License tampering has occurred.
32026		Token expired	The license token for the current CPLEX process has expired.
32027		Maximum number of CPLEX processes exceeded	This happens when the number of simultaneous CPLEX-based processes is greater than or equal to the maximum number of processes licensed. This can also happen if Library users do not call CPXcloseCPLEX().
32028		Error in token creation	File system error.
32029		Cannot find token	Previously created token cannot be accessed. Tampering has occurred.
32030		Invalid location of licensing directory	On PC systems, the license directory must be on the same drive as the operating system.
32031		Default license deletion requires superuser privileges	On Unix systems, the default license can only be deleted by the superuser.
32032		Pointer file is a directory. Check CPLEXLICTYPE setting	CPLEXLICTYPE specifies keyless licensing, but CPLEXLICENSE corresponds to a directory.
32033		Licensed quota has expired	The license specifies that a given quota of CPU time is allowed, but the quota has expired.
32035		Cannot find newly created token	Previously created token cannot be accessed. Tampering has occurred.
32037		Cannot update license file - check permissions	This occurs when there is some type of writing error when creating or updating the licensing file. This could happen if the file system is nearly full or if permissions are incorrect. Running cpxlicense as root usually eliminates this problem.
32038		Process number of licensee does not match current	License tampering has been detected.
32040		Cannot lock newly created token. System error!	File system prevents file locking needed for the License Manager to work.
32041		Host has an identifier of zero. Install proper key.	This occurs when a license key or cable is missing or inaccessible. Simply install the key or check parallel port operation. This only applies to PCs and Macintosh computers.
32042		Improper serial number for keyless license	The created license directory has an invalid date/time stamp, indicating a possible problem with the clock setting on the computer.
32043		Unable to determine root license file location	The system call on a PC to determine the default location of the pointer file failed.
32044		Clock setback detected	The license manager has detected that the clock on the computer has been set back.
32045		Unable to create marker directory	User does not have permissions to write to license directory.
32046		Unable to find newly created marker directory	Previously created marker directory not found. Tampering has occurred.
32047		Unable to rewind marker file	System call failure. Possible tampering.
32048		Unable to update marker file	System call failure. Possible tampering.
32049		Unable to find marker file	Could not find file T.ptr. Possible tampering.
32050		Unable to lock marker file	Could not lock marker file. Possible problem in system configuration in support of locks.
32051		Unable to read marker file	Could not read file T.ptr. Possible tampering.
32052		Invalid encrypted directory in marker file	Tampering has occurred.
32053		Unable to find marker directory	The directory specified in T.ptr was not found. Either tampering has occurred, or there is a system problem.
32054		Invalid encrypted characters in marker file	Tampering has occurred.
32055		No match in marker times	The system encoded time in the marker directory did not match what was encoded in the T.ptr file. Due to system processes updating status of CPLEX license directory files independent of CPLEX.
32056		Cannot create marker file	Permissions do not allow T.ptr to be created in the marker directory.
32057		Cannot delete marker directory	Permissions do not allow marker directory to be deleted. Possible tampering.
32058		Cannot delete marker file	Permissions do not allow marker file to be deleted. Possible tampering.
32059		Clock must be set to current date and time	The clock on the computer must be set to the current date and time. Dates in the past are rejected.
32301		CPLEX MIP option not licensed	CPLEX's MIP algorithm is optionally licensed. Your license is without MIP. Contact your CPLEX representative to license this option.
32302		CPLEX Barrier option not licensed	CPLEX's Barrier algorithm is optionally licensed. Your license is without barrier. Contact your CPLEX representative to license this option.