Originally posted by: prashanw

I am trying to warm start a MIP in the python API. My steps are below

1. I am running cplex.solve() insider a loop (i.e multiple iterations)

2. I get a solution from the previous iteration and use it to warm start the current iteration. (For the very first iteration it's random initialization)

3. When I call my_prob.MIP_starts.add() I get the following error 

Whats the cause and how do I get rid of this error!....I have actually previously successfully warm started the MIP. It's simply that in this instance its giving me this error and I don't know the reason behind it, nor a way to debug it. Any help would be greatly appreciated.

Thanks!

Prashan

Are you using the optional name parameter to MIP_starts.add() or not?  If you are, what happens if you try without it?  Can you provide a small example that reproduces this behavior?