[Help-glpk] How to analyze which constraint (or combination of constraints) is causing the model to become unsolvable?

[Yaron Kretchmer]

Hi All
I'm working on refining a model by adding constraints, and managed to over-constraint the problem and make it unsolvable.
Besides trial and error (i.e. removing constraints until problem becomes solvable, then adding them piecemeal), is there a more systematic way of figuring out what combination of constraints is causing the problem?

Thanks much
Kretch