[Coin-discuss] BCP_MaxPresolveIter

[Matthew Galati]

BCP provides an LP parameter: MaxPresolveIter

"Upper limit on the number of iterations performed in each of the 
children of the search tree node when presolving branching candidates."

Currently, it does not seem to pass this parameter onto the LP solver in 
BCP_lp_perform_strong_branching.

In the user class, one way to force this (at least in the case of using 
CPX) is:

OsiSolverInterface* MYAPP_lp::initialize_solver_interface(){
  OsiXxxSolverInterface * si = new OsiXxxSolverInterface();
#ifdef COIN_USE_CPX
  si->setIntParam(OsiMaxNumIterationHotStart,
          getLpProblemPointer()->param(BCP_lp_par::MaxPresolveIter));
#endif
  return si;
}

It seems you could also do this in MYAPP_lp::modify_lp_parameters().

Matt

-- 
Matthew Galati
ISE Lehigh University
IBM Service Parts Solutions
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