[Scip] Deleting variables

[Ambros Gleixner]

Hi Jonas,

deleting variables is only difficult during the solution process.  As I 
understand, you want to delete variables only after finishing one solve. 
  To do this, you have to call SCIPfreeTransform() to return to the 
problem creation stage.  Does this solve your problem?

Best regards,

Ambros


Am 23.04.2013 08:53, schrieb Jonas Witt:
> Hi all,
>
> I'm having problems with deleting variables. I know you list deleting
> variables as a known bug on your website, but maybe you can still help me.
>
> I use a sub-SCIP and initialize it with some initial variables and
> constraints. This should work as some kind of pattern. So everytime I
> use this sub-SCIP, I want to add new variables and constraints to it,
> solve it and then delete the recently added variables and constraints.
> So after this solving proccess, the sub-SCIP should only consist of
> initial variables and constraints.
>
> I delete the recently added constraints with SCIPdelCons(). After this
> deletion the recently added variables do not belong to any constraint of
> the problem. Then I tried to delete these variables via SCIPdelVar() but
> failed (the variables still belong to the problem). It is important to
> really delete these variables and not just fix them to zero.
>
> How can I use the sub-SCIP the way I have described it without copying
> the whole problem?
>
> Best regards,
> Jonas
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-- 
____________________________________________________________
Ambros M. Gleixner
Zuse Institute Berlin - Matheon - Berlin Mathematical School
http://www.zib.de/gleixner