I am running a fairly large problem in CPLEX OPL and get the error :
CPLEX Error 1001: Out of memory
This error comes up in 17 minutes, when the Engine Log tab at the bottom has nothing yet. There are a few debugging scripting logs and they appear within these 17 minutes.
The problem is fairly large and for some data it has run even 70 hours.
I have set a gap tolerance of 0.017 in the Settings under : Mixed Integer Programming, Tolerances.
Although this problem did not show up anything in the log, to give an idea on a similar data with a few less constraints it could have over 1640 binary variables, and 112335 other variables, and over 5 million non zero coefficients. In this run I had introduced a few more constraints and variables(no binary variable added). The previous problem had completed run in 5 Hrs on another higher speced computer.
My computer has the following specs : 2.9 Ghz, 32 GB RAM. I had restarted the computer to make available as much dedicated memory to OPL as possible.
Any suggestions on how this could be overcome ?