[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Help-glpk] numerical instability

From: Andrew Walbran
Subject: [Help-glpk] numerical instability
Date: Sat, 4 Feb 2006 18:09:05 +1300
User-agent: KMail/1.8.3

I am working on building an LP model of an electricity market. I had a model 
that ran in about 20 seconds. After changing some of the input data, I ran it 
again, and this time GLPK kept giving the message:
'spx_simplex: numerical instability (primal simplex, phase II)'
and took much longer to run.

What does this message mean, and is there anything I can do about it to make 
my model run faster?

I am using GLPK 4.8. A copy of some of the output from GLPK is attached.

Andrew Walbran

Attachment: GLPK_output.txt
Description: Text document

Attachment: pgp_sWhqBDvNv.pgp
Description: PGP signature

reply via email to

[Prev in Thread] Current Thread [Next in Thread]