Originally posted by: stathis_d

Hi guys, 

i'm working on the attached model and i  have one small problem / question. The model seems to work fine, however I would like to run it for  Period=1...3 and not 0...2, but every time that i change the Period to 1...3, it doesn't extract the expressions and I get errors that the variables are out of bound . I tried to modify some of the constraints but nothing seems to work, can someone help with that ? Thanks in advance. 

Hi,

you should not try to get values from array if you are out of range.

For example, you do

forall(i, j in Nodes,t in Period )
   y[i][i][0]==2;

but

y is defined in dvar int+   y[i in Nodes][j in Nodes][t in Period];

So you should have 0 in Period

which is true if Period is 0..2 but is not true if Period is 1..3

You should try to fix your model.

Regards

Originally posted by: stathis_d

You are right ! that was a stupid mistake, it works now ! thanks a lot for your help ! 

Regards