John Forrest

Should be fixed in stable, but simpler to avoid having multiple rhs, rnges or bounds in mps file. On 26/05/2022 10:21, mengtsinghua wrote: > > The above LP problem can...

updates_after_line_1 = [6, 0, -6] | is an invalid CoinIndexedVector in packed mode. On 25/09/2020 08:58, Dami Choi wrote: > I was playing around with the pivotColumn function in the...

Apologies - I misunderstood how you were describing vector. The correct answer is that the code does not compute entries for basic variables. John Forrest On 25/09/2020 17:15, Dami Choi...

Use cbc not clp. There may be bugs with semi-continuous variables - one output line is 2 semi-continuous variables - report odd behavior However cbc reports the problem to feasible...

If you run cbc with -preprocess off, then it works with ccc.mps. I have fixed the bug with preprocessing in master/Cbc/src/CbcSolver.cpp. With the big problem, you will probably need preprocessing...

I am working on getting preprocessing to work with SC variables. Will keep you informed of progress. John Forrest On 19/11/2020 16:30, raller09 wrote: > Hi, > > i changed...

I have made modifications to Cbc to allow preprocessing on problems with semi-continuous variables. The large problem has 33969 rows, 59242 columns and 6328 semi-continuous variables which is preprocessed down...

Are you using code in master? I found an odd bug in Mixed Integer Rounding cuts and fixed it. You can just switch those off if you want. With old...

A scaling issue - 5.55...e-17 is below standard zero tolerance. If you add model.scaling(); before primal all 4 runs give same result. On 22/12/2021 06:55, Hongkai Dai wrote: > >...

Markus, The best way is to put a modified driver into the examples directory and compile with make DRIVER=stopafter. When I put an example in xxx/Cbc/master/examples, I have to add...