[Ipopt] Detecting violated constraint qualification

Martin Schmidt mschmidt at ifam.uni-hannover.de
Wed Aug 18 05:42:32 EDT 2010

Hi at all,

I try to solve an optimization problem with Ipopt and I often get the
messages "1 Slack too small, adjusting variable bound" or "WARNING:
Problem in step computation; switching to emergency mode."

I read in other postings to this list that these errors might occur if
the problem doesn't satisfy the LICQ. Is there any mechanism to detect
the constraint violating the LICQ?

Thank you,
Martin Schmidt

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