Originally posted by: Rahimeh

Hi everyone.
I have a difficulty in using lazy constraints with ILOG concert. I would appreciate any help.

I have grouped my constraints in ilorange array. When I add the ranges to the model and invoke solve() every thing goes fine and i get the optimal solution. But when I use to have one of these ranges as lazy constraints the solver stops and reports "invalid cut".
I am wondering if any one has experienced this before.

Is there any criteria upon which we can choose the lazy constraint or any sort of inequlity can be a lazy constraints.

Many thanks.
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