Originally posted by: open_ball

Hi,

 

I am receiving 1001: out of memory error after running my model. As a possible solution approach, I have increased the available memory for working storage from 2GB to 12GB. Also, I switched the node storage from memory to disk; however, I keep receiving the same error. Below I am sharing the engine log and the screen shot of the statistics module. I was wondering if there is an alternative way to overcome this issue rather than what I have tried so far. 

 

CPXPARAM_WorkMem                                 12048

CPXPARAM_MIP_Strategy_File                       2

CPXPARAM_MIP_Strategy_CallbackReducedLP          0

Presolve has eliminated 1584 rows and 0 columns...

Presolve has eliminated 386391 rows and 12430465 columns...

Presolve has improved bounds 11105399 times...

Presolve has eliminated 612660 rows and 12960318 columns...

Presolve has improved bounds 12835176 times...

Presolve has eliminated 842996 rows and 13374187 columns...

Presolve has improved bounds 12979433 times...

Presolve time = 160.76 sec. (52736.29 ticks)

Warning: MIP starts not constructed because of out-of-memory status.

 

Root node processing (before b&c):

  Real time             =  202.00 sec. (72617.20 ticks)

Parallel b&c, 4 threads:

  Real time             =    0.00 sec. (0.00 ticks)

  Sync time (average)   =    0.00 sec.

  Wait time (average)   =    0.00 sec.

                          ------------

Total (root+branch&cut) =  202.00 sec. (72617.20 ticks)

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi,

have you had a look at

http://www-01.ibm.com/support/docview.wss?uid=swg21400051

?

You could also try machines in the cloud : https://onboarding-oaas.docloud.ibmcloud.com/

regards

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: open_ball

Alex,

 

I am receiving the same error in the following link. 

 

https://www.ibm.com/developerworks/community/forums/html/topic?id=ae675c97-326f-4025-8bf9-c9cd6b6f3c5b

 

So, should I convert all the excel sheets into a dat file to run the model in cloud? The link that you shared with that guy is not working. 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi

in cplex documentation you should look at IDE and OPL > CPLEX Studio IDE > IDE Reference > Processes and Procedures > Generating output files

regards

#DecisionOptimization

Originally posted by: open_ball

Hi Alex,

 

I once again thanks for your help. 

 

I uploaded my files to DropSolve, but it seems like the process will stop at 60 minutes. I went to the settings to modify it; however, the system does not allow me. Is there a way to run the model for a longer time in the free trial mode?

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi

indeed

Solve process of
up to 60 minutes
per problem

With the free trial 

regards 

#DecisionOptimization
#OPLusingCPLEXOptimizer