Julian Hall
No, sorry, I discovered yesterday that I forgot to write a binding for setBasis. It's now an issue #1733 on GitHub, so it will certainly be in the next release...
There are a few scenarios in which HiGHS fails to solve an LP, and these yield "kNotset". My best advice is to solve again with non-default setting of random_seed. Naturally...
If the model is infeasible then HiGHS will normally detect it and return kInfeasible. One "failure" comes when the anti-cycling technique stops the basis change that would yield an optimal...
Ultimately you can call clearSolver to force the solver to run from scratch. #1598 will yield another option
Draft version now in `latest`
> Really hope it would be merged soon! Lazy constraint is very handy for large models! There's still a lot of work to do, but I will be looking for...
I've reproduced this with v1.5.3, and it also occurs with the most recent release (v1.6.0) but it doesn't occur with our "latest" branch. Although I've got some memory of this...
You've got a very large range in the matrix entries `[2e-08, 4e+07]`. If I remove just the matrix value `-1.6421681309280297e-08` (five much smaller values are removed automatically when the MPS...
Thanks for the instance. I can probably identify the presolve reduction that causes the problem I can believe that SCIP is more robust. If this is more important than speed,...
If you're on the edge of good/bad solver behaviour, rounding may play a part. Clearly there's no rounding when you avoid the use of an MPS file. Improving the formulation...