[Scip] Error reagrding SoPlex when trying to solve a problem

[Ambros Gleixner]

Hi Stephan,

thanks for your report!  It is similar to the post of Steve Maher on Feb
18 this year.

The problem is a SoPlex issue which we have already fixed in our
developer version.  I'll send you a patch, and the next official release
will have this fixed automatically.

ambros



Am 16.03.2011 15:38, schrieb Stephan Bieband:
> Dear SCIP mailing list users,
> 
> I'm a new user to SCIP as well as to this mailing list and - after 
> successfully solving some easier problems with SCIP to get familiar to 
> how the API works - came across a problem that seems to be a bit more of 
> a basic nature.
> 
> When running SCIPsolve after having created a problem and added 
> variables and constraints to it I get the following error(s) after the 
> presolving phase:
> 
> [src/scip/lpi_spx.cpp:3100] ERROR: SCIPlpiGetPrimalRay() not supported
> 	by SoPlex
> [src/scip/lp.c:13515] ERROR: Error <-6> in function call
> [src/scip/lp.c:12257] ERROR: Error <-6> in function call
> [src/scip/solve.c:830] ERROR: Error <-6> in function call
> [src/scip/solve.c:1962] ERROR: Error <-6> in function call
> [src/scip/solve.c:2680] ERROR: Error <-6> in function call
> [src/scip/solve.c:3297] ERROR: Error <-6> in function call
> [src/scip/scip.c:6829] ERROR: Error <-6> in function call
> [ScipTest.cpp:531] ERROR: Error <-6> in function call
> 
> I really have no idea what might cause of this error. Any help with this 
> would be greatly appreciated!
> Please let me know if you need any further information and especially 
> which informaton you need.
> I should add that I'm a student of electrical engineering and not a 
> mathematician, so I'm not familiar with the theory behind SCIP or SoPlex.
> 
> Best regards,
> Stephan
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> Scip at zib.de
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-- 
____________________________________________________________
Ambros M. Gleixner
Zuse Institute Berlin - Matheon - Berlin Mathematical School
http://www.zib.de/gleixner