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Re: [Help-glpk] numerical instability

From: Michael Hennebry
Subject: Re: [Help-glpk] numerical instability
Date: Fri, 8 Jul 2011 12:54:12 -0500 (CDT)
User-agent: Alpine 1.00 (DEB 882 2007-12-20)

On Fri, 8 Jul 2011, Akhil langer wrote:


Thanks, Andrew. The NaN problem has been resolved. However, I keep getting
the following warning:

Warning: numerical instability (primal simplex, phase I)

Please note that I have been using INT_MAX as the upper bound for some
columns. Could that be the cause of the instability? I can change these
columns also to be free but that would require some changes in the code.
Just wanted to check with you if changing the code will remove the

That is still rather large.
I'd bite the bullet and make the code changes.
In the alternative, find sensible bounds.

Michael   address@hidden
"Pessimist: The glass is half empty.
Optimist:   The glass is half full.
Engineer:   The glass is twice as big as it needs to be."

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