[Coin-ipopt] Problem With NL Problem With > 100 Variables

[Jacob C.]

Running 3.2.3 on XP compiled with default under cygwin through AMPL.

It seems that when I hit roughly 100 variables IPOPT spits out the following (halt_on_ampl_error set to TRUE):

EXIT: Invalid number in NLP function or derivative detected.
Error in an AMPL evaluation. Run with "halt_on_ampl_error yes" to see details.
Exception of type: Eval_Error in file "IpOrigIpoptNLP.cpp" at line 403:
 Exception message: success && IsFiniteNumber(ret) evaluated false: Error evaluating the objective function

EXIT: Some uncaught Ipopt exception encountered.
can't open at1564.sol

-----------------------------

I'm very much a beginner and have little where to even start tracking this down. FWIW, the problem runs smoothly with MINOS 5.5. Will provide the model upon request.


Thanks,
Jac.

       
---------------------------------
Don't get soaked.  Take a quick peak at the forecast 
 with theYahoo! Search weather shortcut.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://list.coin-or.org/pipermail/ipopt/attachments/20070412/64ffa5ac/attachment.html