Originally posted by: xinzhangandy

Dear all,

I have written a supply chain network model with OPL.Now, I want to test the model with different customer demands. Then I  modify it(Dem) in my data file, I run my model in Cplex 12.8, test1 can be solved in about 23 seconds，but test2 and test3 can not get a solution. I want to know whether there is something wrong with my code, or I need to set something elso to get the solution. Attached is my code and test data.

Thank you.

Hi,

if you turn your integer decision variables that are supposed to be float into dvar float:

dvar float+ Qoa[I][J][R][T][S];
dvar float+ Qob[J][K][P][T][S];
dvar float+ Qoc[K][L][P][T][S];
dvar float+ Qod[L][M][P][T][S];
dvar float+ Qoe[M][E][P][T][S];
dvar float+ Qof[M][F][P][T][S];
dvar float+ Qog[F][G][R][T][S];
dvar float+ Qoh[E][K][P][T][S];
dvar float+ Qoi[F][J][R][T][S];

then you ll get a solution after very little time

regards

Originally posted by: xinzhangandy

HI, Alex,

It really works, thank you for your help.