[SciPy-user] OpenOpt: ralg crash

dmitrey dmitrey.kroshko@scipy....
Mon Aug 4 00:59:38 CDT 2008

Hi Eli,
It seems the bug was due to svn conflict changes
(check your scikits/openopt/solvers/UkrOpt/ralg_oo.py, line 156, svn has 
put "<<<<<<< .mine" there).
Try now latest tarball (or use download from subversion, the bug was 
absent there)

> Another small request concerning OpenOpt.
> Is it possible to provide an example for use of scipy_tnc and 
> scipy_lbfgsb from openopt ?
> Can these solvers work with linear equality constraints ?
Examples are absolutely same to nlp1, nlp2, nlp3, nlp_bench_1, 
nlp_bench_2 etc.
But the solvers can use only lb<=x<=ub constraints.
Regards, D.

Eli Brosh wrote:
> Hello,
> I encountered problems with the ralg solver in OpenOpt.
> the example nlp_3.py, supplied with the OpenOpt library crashed on two 
> computers.
> On an ubuntu linux machine, the program simply stopped without further 
> information.
> On a windows machine, with entought suite, there was a windows error 
> message "pythonw caused a fatal error and it will be closed".
> The problem disappeared when I erased ralg from the solvers list. It 
> did not occur with lincher and scipy_cobyla
> solvers.
> On both machines, the openopt installation was from the latest tarball 
> (no more than week old).
> What is the problem ?
> Can it be corrected ?

> Thanks
> Eli

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