Originally posted by: cplexforMatlabuser

Hello,

I am using CPLEX Academic Initiative Version 12.2 with the toolbox API for Matlab. I try to solve a unit commitment problem with 54 power plants (gas and coal) and one storage for an optimization horizon of 36 hours. I am using a 64 bit machine and assigned 2 GB RAM to cplex. I get the CPLEX 1001 out of memory error after 2 or 3 minutes. I have tried node file storage, setting probing to 3 and setting all mip cuts to 2, but it doesn't help. However, from some papers I have read I think the problem should be solvable with the machine I use. I would be very grateful for any hints! I attached my program. In the next post, I also attach the needed Excel file to run the program.

Thanks a lot in advance!
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Originally posted by: cplexforMatlabuser

these are the power plants.
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Originally posted by: cplexforMatlabuser

Sorry, after I set the mip cuts to 2, I didn't pass the option to cplex. Doing this helps to solve the problem. Now I am trying 200 power plants and get an out of memory error.
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Originally posted by: John Cui

You didn't pass option to cplexmilp function.

[x,fval,exitflag,output]=cplexmilp(f,A_ineq,b_ineq,A_eq,b_eq,[],[],[],lb,ub,ctype');

should be

[x,fval,exitflag,output]=cplexmilp(f,A_ineq,b_ineq,A_eq,b_eq,[],[],[],lb,ub,ctype',[],option);

John Cui
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