Andrew: Thanks for the response. However, when I try the -wlp option I am informed that it is unknown. Are you referring to -w? Similarly with the --lp option.
I get that the intention is to break this into multiple steps, i.e. glpsol -m MP_layout.mod -d MP_layout.dat -w MP_layout.lp --check glpsol -m MP_layout.mod -d MP_layout.dat -r MP_layout.lp When I try the second step, glpsol complains that the MP_layout.lp does not exist. I have read through the docs but seem to be missing important material. Can you please be more specific or point me in the right direction? TIA Michael Bramley tel: +1 513 632 0549 www.dunnhumby.com -----Original Message----- From: Andrew Makhorin [mailto:[email protected]] Sent: Tuesday, June 19, 2012 11:31 AM To: Michael Bramley Cc: [email protected] Subject: Re: [Help-glpk] glpk tells me to contact support team - xmalloc failed. > 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. The contents of this message and any attachments to it are confidential and may be legally privileged. If you have received this message in error you should delete it from your system immediately and advise the sender. dunnhumby may monitor and record all emails. The views expressed in this email are those of the sender and not those of dunnhumby. _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
