ConstrainedMin: "assertion failed at "\[InvisibleSpace]" after perturbation steplength > 0"
- To: mathgroup at smc.vnet.net
- Subject: [mg39481] ConstrainedMin: "assertion failed at "\[InvisibleSpace]" after perturbation steplength > 0"
- From: Uri Zwick <zwick at tau.ac.il>
- Date: Wed, 19 Feb 2003 04:41:43 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hi, I am using Mathematica's ConstrainedMin to solve several fairly large linear programs with rational coefficients. (The programs involve several hundred variables and more than a thousand constraints.) In several cases, after hours or days of running time I get the following message printed: "assertion failed at "\[InvisibleSpace]" after perturbation steplength > 0" How should I interpret this message? Are the results that I get after the message (and indeed before it) reliable? I tried several times to reproduce the message, starting with a clean session, but it didn't quite work. It seems that what I did before the call to ConstrainedMin that produced the message is also relevant. Did anyone encounter such problems with ConstrainMin before? Best regards, Uri