John Forrest

There may be problems in C interface but your C program is incorrect (and segfaults when I run it). There are two columns so it should be int start[3] =...

Hopefully fixd in master If you want to check it is a simple fix in Clp (1.17.6) a/src/ClpSolve.cpp +++ b/src/ClpSolve.cpp @@ -2670,6 +2670,11 @@ int ClpSimplex::initialSolve(ClpSolve &options) model2->addColumns(numberArtificials, NULL, NULL,...

John, Again fixed in master - change is trivial diff --git a/Clp/src/ClpModel.cpp b/Clp/src/ClpModel.cpp index 4568dba4..f11fff43 100644 --- a/Clp/src/ClpModel.cpp +++ b/Clp/src/ClpModel.cpp @@ -3752,7 +3752,8 @@ int ClpModel::emptyProblem(int *infeasNumber, double *infeasSum, bool...

Sebastian, Will look at it. It is a very easy problem! - just very large. I think there are two reasons why it takes so long. One is that probing...

Aleksandr, I think the problem is that the model is so nearly dual infeasible - even with original objective, that it is easy to get different optimal values. The 557...

Thanks - will look at SOS bug in preprocessing. On 15/11/2021 15:18, raphGbck wrote: > > I built a MILP model with Pyomo, with a few binary variables. > See...

Tolerance problem - non zero bound was computed which was below tolerance but not zero. Hopefully fixed in stable by being a bit more cautious. On 15/11/2021 15:18, raphGbck wrote:...

Will try and have it fixed by Monday. John Forrest On 26/06/2021 15:51, tosttost wrote: > That looks like a problem with preprocessing: > > |$ cbc clipping_demo_m1000_x28e-2.lp -preprocess off...

Should be fixed in master. On 26/06/2021 15:51, tosttost wrote: > That looks like a problem with preprocessing: > > |$ cbc clipping_demo_m1000_x28e-2.lp -preprocess off -solve Welcome to > the...

Seems to be an error in reading mps files with more than one rhs.  If the two lines RNG1 are commented out the correct solution is found.  Somehow the lower...