[Coin-discuss] regarding gmpl

[David Rader]

I have started playing around with using gmpl, along with clp and cbc, 
as a potential modeling language for some classes I teach and noticed 
some potential problems with how Coin uses it.

First, is there a reason why using OsiSolverInterface's readGMPL does 
not save the names of the columns and rows?  I can understand not doing 
this for other types of files, but it seems that, for a modeling 
language, having easy access to the row and column names is important. 
   Is it possible that this feature can be added?

Second, I think there is an error in CoinMPSIO::readGMPL.  If there is 
data for the model, and it is contained in the same file, 
mpl_read_model(...) returns a value 2 if read correctly;  however, if 
there is no data for the model (such as in queens.mod from the glpk 
examples), the return code is 1, causing readGMPL to determine that an 
error has occurred.

Thanks for the help.

Dave