Julian Hall
To speed up things I would, however, not require all ranging information, but only require to compute the cost ranging lower value for those basic integral columns that sit at...
I've just spotted that IPX says that this problem is infeasible when HiGHS is run without presolve. The same happens with the vanilla IPX from Lukas' repo @galabovaa so I've...
> I can replicate the issue: > > * solver: ipm > > * presolve: off > > > MPS file: > > ``` > NAME > ROWS > N...
Interesting. I should observe that there's no check in writeMPS that "Inf" isn't being written out. It's just an assertion that it's possible in principle. Looking at the code, if...
Sure - it was created with writeMPS from the unit test check/TestSpecialLps.cpp (issue280) where I hard-code your example.
This certainly still happens with the IPM solver - and I can't see us getting it fixed, although I expect to be doing more with the Interior point solver myself...
There are tests for the run time reaching `time_limit` in the MIP solver, but it may not be done somewhere that it can spend this length of time for a...
@DillonJ Are you building from source, or using the JuMP-hosted binaries?
Thanks for this. I understood that the way the solver had been written was thread-safe, and I know how important it is to people developing multi-threaded applications like you. I'll...
No, each HighsModelObject has its own HighsSimplexInfo. My only thought about the iteration count error report is that it involves static values - that I thought I'd heard were bad...