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<p>Dear SCIP community,</p>
<p>I am working on a branch-and-price approach for a specific
problem and wanted to add a simple heuristic which solves the same
problem with some variables fixed. I implemented the copying
callbacks for my problem data and pricer, but now face the problem
that `SCIPcopy` throws an exception due to the SCIP copy being in
the wrong stage.</p>
<p>The SCIP copy is a freshly created instance and therefore the
INIT stage, as expected by `SCIPcopy` (see `scip_copy:2888` in
SCIP 8.0.2). But then the pricers are added and activated
(`set.c:911`), which is only possible in the PROBLEM stage
(`scip_pricer.c:380`). I can not find a use of `SCIPcopy` with
pricing enabled in the codebase of the SCIP Optimization Suite, so
it is unclear to me if I should do something different here. I
would greatly appreciate your help.</p>
<p>All the best<br>
Alex<br>
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