[Coin-discuss] Re: Trouble with COIN's MPS Writer

[Laszlo Ladanyi]

I have fixed the bug in CoinMpsIO.cpp. Thanks for spotting it, Joseph.

--Laci

On Tue, 2 Dec 2003, Andrew Makhorin wrote:

> >       I've been using COIN to solve linear programming relaxations of
> >SDPs.  However, I have a few test cases that seem to crash COIN.  So, 
> >before I solve the LP, I write the problem to an MPS file.  However, it 
> >appears that COIN is generating an invalid problem.  Here's a summary of 
> >the results that I receive when I give the file to a variety of 
> >different solvers:
> >...
> >glpsol          invalid data card
> 
> MPS format requires fields 5 and 6 to be placed in columns 40-47 and
> 50-61, respectively, while in your file these fields are placed in
> columns 39-46 and 49-60. Note, however, that some solvers allow
> deviations from strict MPS formatting (glpsol does not allow that).
> 
> Andrew Makhorin
> 
> 
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