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[Help-glpk] glpsol solution file dependent on input format?
From: |
Oliver Soong |
Subject: |
[Help-glpk] glpsol solution file dependent on input format? |
Date: |
Thu, 12 Aug 2010 00:29:16 -0700 |
I was working with glpsol.exe (compiled using VC++ 2010 Express) and
came across some odd behavior. I'm not sure if this is documented
somewhere I couldn't find, but I get different solution files (-w
option) depending on the format of the input file. I've attached an
example problem, but I suspect any will work. Here's what I did:
glpsol problem.mps --check --wlp problem.lp
glpsol problem.mps -w mps.sol
glpsol --lp problem.lp -w lp.sol
lp.sol has 323 lines, while mps.sol has 324. On closer examination,
mps.sol has an entry for the objective (line 3), while lp.sol does
not. I think mps.sol is incorrect, according to the solution file
format documented under glp_write_mip.
Also, the documentation for glp_write_mip, under the File format
portion, refers to glp_write_sol.
Otherwise, a great tool. I hope it scales well!
Oliver
problem.mps
Description: Binary data
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