GAMS — The Solver Manuals - Available Software

230 DECIS
15. ERROR: error code: inform
The solver returned with an error code from solving the problem (master- or subproblem). Consult the
users’ manual of the solver (MINOS or CPLEX) for the meaning of the error code, inform. Check the
problem formulation.
16. ERROR: while reading SPECS file
The MINOS specification file (MINOS.SPC) containes an error. Check the specification file. Consult the
MINOS user’s manual.
17. ERROR: reading mps file, mpsfile
The core file mpsfile (i.e., MODEL.COR) is incorect. Consult the DECIS manual for instructions regarding
the MPS format.
18. ERROR: row 1 of problem ip is not a free row
The first row of the problem is not a free row (i.e., is not the objective row). In order to make the fist row a
free row, set the row type to be ’N’. Consult the DECIS manual for the MPS specification of the problem.
19. ERROR: name not found = nam1, nam2
There is an error in the core file (MODEL.COR). The problem cannot be decomposed correctly. Check the
core file and check the model formulation.
20. ERROR: matrix not in staircase form
The constraint matrix of the problem as specified in core file (MODEL.COR) is not in staircase form. The
first-stage rows and columns and the second-stage rows and columns are mixed within each other. Check
the DECIS manual as to how to specify the core file. Check the core file and change the order of rows and
columns.