[Scip] [SCIP] adding constraints during pricing

[Stefan Heinz]

Hi,

when you create the new linear constraints did you set the initial flag 
to TRUE (this is the first Boolean of the ten)?

http://scip.zib.de/doc/html/cons__linear_8h.html#aa7aed137a4130b35b168812414413481

Doing that should put the new constraints into the LP before it is 
solved again. The magic happens in the method SCIPpriceLoop()

http://scip.zib.de/doc/html_devel/solve_8c_source.html#l01625

in line 01755.

Best Stefan

On 03/30/2012 11:33 AM, Hélène Toussaint wrote:
>
> Hi,
>
> I have a BCP code. When I generate a new variable in the redcost 
> function of the pricer I must generate also several constraints in 
> which this new variable appears. To generate and add these constraints 
> I use SCIPcreateConsLinear and SCIPaddCons.
>
> My problem is that some of these constraints are not taken into 
> account: before branching I use SCIPvarGetLPSol to see the current lp 
> solution and this solution does not always satisfy all the constraints 
> added in the pricer.
>
> How to tell SCIP to take into account my new constraints ? I'd like 
> the current lp solution be updated every time a new constraint is 
> added (even before generate a new variable since it changes the dual 
> costs).
>
> Best,
> Hélène
>
>
>
>
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