[Scip] (no subject)

Tscheik@gmx.de Tscheik at gmx.de
Wed Jul 20 10:27:07 MEST 2011


Hello everyone,

we've run into some problems with scip. Currently we are implementing a relaxation handler in scip, that does all the LP-solving (so we disabled the lpsolver with lpsolve=-1). As our test showed we encounter an error in the
file solve.c, line 2232-2239:
   if( SCIPtreeHasFocusNodeLP(tree) )
      objinfeasible = FALSE;
   else
   {
      pseudoobjval = SCIPlpGetPseudoObjval(lp, set);
      objinfeasible = SCIPsetIsLT(set, pseudoobjval, SCIPnodeGetLowerbound(SCIPtreeGetFocusNode(tree)));
   }
It seems that if we give scip a problem without an LP (only with constraints handled by our constraint-handler) there seems to be something wrong within these lines of code.
In our opinion it (maybe) should read SCIPsetIsGT instead of ~LT as the pseudosolution is always the worst possible solution?

Best Regards,

Tscheik
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