> Running a rather large model and I get the following output (see > below), which is solved by AMPL in about 17 minutes (very old 32 bit > version).
> All other testing runs quickly (smaller models) for this glpk 32 bit > version (4.47). > When I try the 64 bit version, I error at line 70 of glpenv05.c almost > immediately. > Any thoughts on how to proceed? To reduce the memory requirements you may try to solve your model in two stages as follows: glpsol -m MP_layout.mod -d MP_layout.dat -wlp MP_layout.lp --check glpsol --lp MP_layout.lp ... However, being of mip class your model may happen to be hard for glpk because of its size, so glpsol may not be able to solve it to optimality for a reasonable time. Please see: http://lists.gnu.org/archive/html/help-glpk/2008-07/msg00044.html for some calculations about the memory requirements. _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
