Forum Discussion
Bug report: problem.loadproblem not correct
Hi, In Python, I want to give an MIQP to Xpress directly [i.e. in matrix form], as it saves me the time to construct the model. To do so, I am using the problem.loadproblem functionality explained i...
Hi Richard,
it seems to be a bug of loadproblem(): for some reason it expects either integer/binary variables AND special-ordered sets (SOS) or it doesn't read any. To overcome this temporary bug (to be fixed asap) I suggest using, before solve(),
p.chgcoltype([0,1], ['I', 'B'])
Thanks,
Pietro