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Reporting Bugs
SCIP has more than 270 000 lines of source code and
is definitely not bug free.
The standard way to report a bug (English or German)
is via the following Bug
Submission Page (located at TU Darmstadt).
If this does not work, you can send an email to
Timo Berthold,
Stefan Heinz
and/or
Kati Wolter.
Mailing List
The SCIP mailing list can be accessed via the
SCIP
mailing list page.
Known Bugs
Here is a list of known bugs in the current version:
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If one uses column generation and restarts, a solution that contains variables
that are only present in the transformed problem (i.e., variables that were
generated by a pricer) is not pulled back into the original space correctly,
since the priced variables have no original counterpart. Therefore, one should
disable restarts by setting the parameter "presolving/maxrestarts" to 0, if one
uses a column generation approach.
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Currently, SCIP cannot delete variables from the problem (deleting variables
from the LP relaxation is possible) - we are working on this problem. If you
need to disable a variable, fix it to zero (if that is a feasible value). This
can be done by using
SCIPfixVar() or
SCIPchgVarLbNode() and SCIPvarChgUbNode() in the
branching (see How to add
branching rules). See also Specific questions about Column Generation and Branch-And-Price with SCIP.
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