[Scip] numerical troubles in LP when using Cplex

[Tobias Achterberg]

Please try to set "lp/fastmip" to false. If this does not help, just ask again ;)


Tobias


Sandro Pirkwieser wrote:
> Hi all,
> 
> I am experiencing problems when using Cplex 11.1 as well as 11.2 as LP
> solver in a branch and price application.
> For some instances it happens that I get many of these warnings/errors:
> "(node xx) unresolved numerical troubles in LP xx -- using pseudo
> solution instead (loop 1)"
> and a lot of nodes are generated, basically without further progress.
> This happens especially when the remaining gap is quite small (zero
> point something). When I apply SoPlex or CLP then this does not occur
> and the program terminates with closing the gap.
> Probably this is only an additional setting to be used in combination
> with Cplex and someone already solved this problem.
> Thanks.
> 
> Best regards,
> Sandro Pirkwieser
> 
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