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Math5.0 frustrated Compatibility Problem

  • To: mathgroup at
  • Subject: [mg56934] Math5.0 frustrated Compatibility Problem
  • From: "Jingming Yao" <jingming_yao at>
  • Date: Tue, 10 May 2005 03:42:50 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

There is a very interesting problem. I have a 4 equations 4 knowns nonlinear 
algebra equation system. It CAN be solved by Math 4.1 or 4.2 but it can NOT 
be solved by Math 5.0. It is the same program. And the error message in Math 
5.0 is "FindRoot:: jsing: Encountered a singular Jacobian at
the point {p02n, DeltaVb2n, n02n, DeltaPhis}={2.9*10^18, 0.61, 3.7*10^11, 
0.5}. Try perturbing the initial point(s)." My program is in the attachment.
[Contact the author to obtain the attachement - moderator]

Uconn, ECE Dept.

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