> > > To avoid this, the rounding heuristic should be disabled. > > Unfortunately, there is no control parameter for this in glp_iocp, so > > I'm attaching an awful hack to disable it from the tspsol callback. > > This is only in case anyone gets an "Assertion failed: kk <= n" error > > and wants to check if this is the reason, I would advise against using > > it for any other reason. > > > > Probably the fact of specifying the callback routine can be used as a > flag to disable primal heuristics, because the callback routine itself > is able to apply heuristics performing necessary feasibility checks. >
I don't like the idea of disabling primal heuristics when a callback routine is used: This is the only case where I can see a problem, while I can think of many scenarios where the heuristics are desirable together with a callback. My preference is to have a flag in glp_iocp to enable the rounding heuristic (like fp_heur and ps_heur) that would be enabled by glp_init_iocp() but the user can then disable. Alternatively (or perhaps additionally), there could be a global flag to disable all heuristics. Best Regards, Chris Matrakidis
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