John Forrest

I was wrong - it is a serious error introduced when trying to improve printout when maximizing.

My mistake - my brain had gone mushy. I can get error with master and it is nothing to do with maximizing. I will update you tomorrow.

a) The reason the reading the mps file works is that is minimizing and the solution with 100 is feasible. When maximizing using the mps file the same problem occurs....

stable seems to work - will look at it. Could be tolerance problem - looking at size of optimal value.

Fixed a definite error in CbcNode to do with SOS (in master). Should fix bug (and seems to). Also fixed memory leak in CglLandP.cpp

Looks as if the error is in the interface to Cbc or an old and bad version of Cbc. If I write out the model as an mps file and...

I have made changes - which I hope do not break anything. Lazy looks OK - Gen still does not work - will look at that - but it is...

I knew I might have made Gen model worse - was going to dig into that today. The reported gap is correct - it is a fraction so (0.211-0.1667)/0.1667

Just ran lazy with 11 - ####### SOLVING ######### Mode.Lazy N= 11 OptimizationStatus.OPTIMAL obj= 0.19090909090909092 solution: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 1.0] Result - Optimal...

Have made more changes. Works for me with 8,9,10,11,50 and 100 One point that might be of interest to people using Cbc master and python-mip is that to help me...