Originally posted by: ShaCplex

Hi,

when i run my model, it gives me no solution saying " Infeasibility row 'c7':  0  = 1." I have created the lp file of my model and found the the constraint c7 as below;

   Assignment#0#0 + Assignment#0#1  + Assignment#0#2  = 1

this is the constraint.. So what should I infer from this? what is wrong in this constraint? How to identify the problem?

Regards,

Shahul

Hi,

let me give you an example:

dvar int x;

subject to
{
x==0;
x==22;
}

gives

Infeasibility row 'c2':  0  = 22.

which looks similar to what you got.

So from there, you may label your constraints:

dvar int x;

subject to
{
ct1:x==0;
ct2:x==22;
}

And then within the IDE you will see relaxations and conflicts

For more, see Relaxing infeasible models

http://www.ibm.com/support/knowledgecenter/en/SSSA5P_12.7.0/ilog.odms.ide.help/OPL_Studio/usroplide/topics/opl_ide_relax.html

regards

Originally posted by: ShaCplex

Thank you sir.