Truls Flatberg

Detection of non-linear/non-convex problem

7

The current implementation calls a different optimization routine depending on internal classification schemes ```julia if model.has_nlp_constraints @checked Lib.XPRSnlpoptimize(model.inner, model.solve_method) elseif is_mip(model) @checked Lib.XPRSmipoptimize(model.inner, model.solve_method) else @checked Lib.XPRSlpoptimize(model.inner, model.solve_method) end ```...

This PR addresses the problems referred to in #274. This will allow more recent versions of Xpress to use correct algorithms based on internal analysis (which is needed e.g. to...