GAMS World Forum

Restarting an LP solver from a previous basis used to be easy and reliable 20 years ago. We even had some tests that for this. With modern LP solvers this is not necessarily the case anymore, let along MIP solvers. Very often you have to decide to a) start from an advanced basis and not do presolve ...

Not sure how many people understand the BONMIN log. My colleague Stefan Vigerske who implemented the GAMS/BONMIN link says he doesn't understand the log either (he suspects that these NLPs are related to some primal heuristics). I guess you need to go to the computer (https://projects.coin-or.org/Bo...

Hi, The documentation has a few hints: http://support.gams.com/solver:error_1001_out_of_memory But I fear that most of these really won't make much of a difference if the tree gets that large (13GB!) . The options that will make a difference (e.g. nodsel/varsel) will most likely compromise the perfo...