[Coin-discuss] OSI, CLP pivot

[Matthew Galati]

If someone wants to do the following, using the "simplex interface":
{
  while{
     //some stuff...
     ...
     si->resolve();
     si->pivot(colIn, colOut, outStatus);
     ...
     si->getBasisStatus();
     si->getBInvARow( );
     ...
     //some stuff...
  }
}

Is it neccessary to call enable/disableSimplexInterface at every call?

I noticed, that if you pivot, the "basis_" is not updated until 
disableSimplexInterface is called. So, the next call to getBasisStatus 
does not have updated status.

The following seems to work, but is very slow. There is alot of time 
spent in enable/disable.

{
  while{
     //some stuff...
     ...
     si->resolve();
     si->enableSimplexInterface();
     si->pivot(colIn, colOut, outStatus);
     si->disableSimplexInterface();
     ...
     si->enableSimplexInterface();
     si->getBasisStatus();
     si->disableSimplexInterface();

     si->enableSimplexInterface();
     si->getBInvARow( );
     si->disableSimplexInterface();
     ...
     //some stuff...
  }
}

Thanks,
Matt