Oscar, > I've attached a patch, but also insert the source below.
Thank you very much for your contribution. I have included lpx_write_pb in the package; please see glplpx19.c attached (some minor changes were made). Also I have added options --wpb and --wnpb to glpsol. I noticed that all coefficients are rounded to integer values, so issuing a warning message in this case would be reasonable. Could you please provide a brief description of OPB format (in plain text)? Best regards, Andrew Makhorin
glplpx19.c.gz
Description: GNU Zip compressed data
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