Hi Stefan and Javed,<br><br>thanks a lot for your respond. My AMPL model is attached. Would you kindly help me to find the source of the error?<br><br>Thanking You,<br><br>Novalio Daratha<br><br><div class="gmail_quote">On Tue, Jun 19, 2012 at 9:06 PM, Stefan Vigerske <span dir="ltr"><<a href="mailto:stefan@math.hu-berlin.de" target="_blank">stefan@math.hu-berlin.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
while Bonmin just uses function, gradient, and hessian values of your functions as provided by AMPL, Couenne has to analyse the analytical expression of your functions in order to be able to construct a convex relaxation of your problems.<br>
If you use operators in your functions that are not supported by Couenne (yet), then you get this kind of error.<br>
<br>
If you post your model, it may be possible to point out which function is making trouble.<span class="HOEnZb"><font color="#888888"><br>
<br>
Stefan</font></span><div><div class="h5"><br>
<br>
On 06/19/2012 07:51 AM, Novalio Daratha wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
Dear All,<br>
<br>
Sorry, the same email was sent without subject. I have an AMPL model that<br>
can be solved using bonmin. However, when I tried to used couenne, there is<br>
an error.<br>
<br>
ampl: solve;<br>
Couenne 0.4.2 -- an Open-Source solver for Mixed Integer Nonlinear<br>
Optimization<br>
<br>
Mailing list: <a href="mailto:couenne@list.coin-or.org" target="_blank">couenne@list.coin-or.org</a><br>
Instructions: <a href="http://www.coin-or.org/Couenne" target="_blank">http://www.coin-or.org/Couenne</a><br>
couenne:<br>
ANALYSIS TEST: ERROR: unknown operator (address 0pa24700), aborting.<br>
exit code 4294967295<br>
<BREAK><br>
ampl:<br>
<br>
I had google it and get no meaningful results. Would anybody help me to<br>
understand this better?<br>
<br>
<br>
Thanking You,<br>
<br>
Novalio Daratha<br>
<br>
<br>
<br>
<br></div></div><div class="im">
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</blockquote></div><br>