[Coin-discuss] CoinLpIO

[Jean-Sebastien Roy]

Hi !

I noticed some solvers (like GLPK) complain when two constraints in an
LP file share the same name, as it is the case for files output by
CoinLpIO.cpp's writeLp function when constraints are ranged.

As a quick fix I added "low" to the second constraint. The CPLEX LP 
format definition do not discuss the possibility of multiple constraints 
with the same name (even if it makes sense in this case). Maybe it can 
be made an option ?

diff -r1.5 CoinLpIO.cpp
628c628
<          fprintf(fp, "%s:", rowNames[i]);
---
>          fprintf(fp, "%slow:", rowNames[i]);

Regards,

js