[Coin-discuss] no integers in writeMps?

[Ted Ralphs]

I believe the reason that OsiCpx doesn't write out integer information 
when using its own internal routine is related to the problem discussed 
a year or two ago with CPLEX dumping solution and integrality 
information when switching between problem types. In order to make it 
work well with CGL, the problem always stays loaded as an LP, even when 
some of the variables are integer, unless the user calls 
branchAndBound(). The integrality information is stored only in the 
cache. Otherwise, OsiCpx cannot be used for branch and cut with the 
current design of CGL.

Ted
-- 
Dr. Ted Ralphs
Assistant Professor
Industrial and Systems Engineering
Lehigh University
(610)758-4784
tkralphs at lehigh.edu
www.lehigh.edu/~tkr2

"An optimist is someone who thinks
'It doesn't get any better than this.'
A pessimist is someone who's afraid that's true."