[Scip] Adding variables in a heuristic

[Jens Leoff]

Dear List,

I am currently implementing a heuristic for some kind of cutting stock 
problem. This heuristic rounds down the continuous variable value for 
each pattern variable in the LP solution and then tries to regain 
feasibility by adding appropriate patterns. Of course it can happen that 
a needed pattern and its variable were not generated in a previous 
pricing round. When I try to add the required variables in the heuristic 
the pricestore will be non-empty and the following assert fails
src/scip/solve.c:1843: SCIPpriceLoop: Assertion 
`SCIPpricestoreGetNVars(pricestore) == 0' failed.
Is there a way to add new variables in a heuristic?

Kind Regards

Jens Leoff