<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Hi all, </DIV>
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<DIV>I am new to this list and I hope it is still active, and I will be able to find knowledgeable folks around here.</DIV>
<DIV>I have the following, hopefully easy question.</DIV>
<DIV>After some remodeling of my model I've realized that it would be much <BR>much simpler and contain much less variables and constraints if IF <BR>statements are used. <BR>I was successful in rewriting the model but now have a problem with AMPL\IPOPT solving it with IF statements in objective function. It returns all zero solution if IF statement is used in objective function<BR>My problem is NLP, but in the future might be developed into MINLP. <BR>Is there some IPOPT option that I have to use? Or maybe it's not possible at all (I hope not). Am I missing something?</DIV>
<DIV><BR>Cheers, <BR>Greg </DIV>
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