[Ipopt] Unknown keywords: mehrotra_algorithm and corrector_type

Stefan Vigerske stefan at math.hu-berlin.de
Thu Mar 14 05:12:07 EDT 2013


On 03/14/2013 07:40 AM, zjuzw at sohu.com wrote:
> Hi,
> Sorry to bother you. When I reset keywords mehrotra_algorithm and corrector_type,
> the error message "Unknown Keyword" displayed. Does it mean current version of IPOPT
> can not execute Mehrotra's predictor-corrector algorithm?

To tell Ipopt to use these options, adding lines like
   mehrotra_algorithm yes
   corrector_type primal-dual
to the options file should be sufficient.
Note that there need to be a newline character after the last option 
setting, too.

> If not,how to configure the
> keywords to bring Mehrotra's predictor-corrector algorithm into effect? And the second
> question is the total time spent by IPOPT is only "Total CPU secs in IPOPT (w/o function
> evaluations)" or "Total CPU secs in IPOPT (w/o function evaluations)" adds "Total CPU secs
> in NLP function evaluations" ? 

I don't understand the last question.
The total time spend in Ipopt should be the sum of those specified in
"Total CPU secs in IPOPT (w/o function evaluations)" and
"Total CPU secs in NLP function evaluations".


> Thank you in advance,and hope for your reply sincerely.  Best Wishes,From Wei.
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