[Cgl] cgl, cpx, mir, error

[Matthew Galati]

Probably the easiest workaround is to fix CglMir to calculate Ax* rather than query it when using OsiCpx. 


-----Original Message-----
From: cgl-bounces at list.coin-or.org [mailto:cgl-bounces at list.coin-or.org] On Behalf Of Lou Hafer
Sent: Wednesday, April 11, 2007 6:15 PM
To: cgl at list.coin-or.org
Subject: Re: [Cgl] cgl, cpx, mir, error

Ted, Matt,

	I know I must sound like a perpetual fussbudget, but ...  it's not that simple.  For one thing, how will you know there's an error?  Look for a bogus return value?  What's bogus?  Look for a throw?  Hah!  That's more inconsistent than most across implementations.  Who's going to check?  Only the client can really say whether they're looking at a bogus return value --- that'll depend on the state of the OSI (unloaded, imposed solution, solution from solver).

	It's a reasonable idea to provide a default (if inefficient) implementation in the base class.  But arguably better to fix OsiCpx so that it knows when to use a solution supplied by the user and when to use a solution from the solver, and when it has no solution available.

							Lou

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