Originally posted by: SystemAdmin

Hi all,

Appreciate if someone could help me with a problem. I have been using ILOG OPL to generate the LP file on my laptop. Basically I have set very small time and node limits.

The data file is generated via a VBA script. The script can generate data files for different planning periods (this is a vehicle routing model by the way): 1 week, 2 weeks and 1 month. There are no problems when generating LP files for the 1 week and 2 week cases. However, I keep getting errors for the 1 month model. It's exactly the same model, only the data file is for 1 month. Below is an abbreviated list of the errors. I can't understand that even simple constraints like g1ibmjbn == 0 cannot be 'extracted'. I've checked the indexing tuples and they seem to be correct.

Can someone please help. Thank you.

Severity and Description Path Resource Location Creation Time Id
Exception from ILOG CPLEX: CPLEX status = 1001 Full Scale Models Unknown 1267064799578 26364
Exception from ILOG CPLEX: CPLEX status = 1001 Full Scale Models Unknown 1267064833156 26368
Exception from ILOG CPLEX: CPLEX status = 1001 Full Scale Models Unknown 1267064834921 26372

OPL cannot extract expression: (-1) <= (thttp://<jbn.i,jbn.b,(jbn.m+1)>+tibm*(-1))/30+g1_bibmjbn*(-1). Full Scale Models Full Scale Models.mod 363:7-363:70 C:\Documents and Settings\USER\My Documents\RESEARCH\OPTIMISATION\CPLEX Models\OPL 6.0\Full scale models\Full Scale Models\Full Scale Models.mod 1267064838750 26393

OPL cannot extract expression: forall(ibm in STmb, jbn in STxmb: jbn.b == ibm.b) g1ibmjbn == 0. Full Scale Models Full Scale Models.mod 385:5-386:23 C:\Documents and Settings\USER\My Documents\RESEARCH\OPTIMISATION\CPLEX Models\OPL 6.0\Full scale models\Full Scale Models\Full Scale Models.mod 1267064840453 26410

Processing failed. Full Scale Models Unknown 1267064843984 26414
Too many errors, giving up at 50. Full Scale Models Unknown 1267064840546 26413
#DecisionOptimization
#OPLusingCPLEXOptimizer