[Clp] Incorrect solution for LP problem

[Kish Shen]

Hi,

I updated CBC yesterday (for dealing with handling of messages via 
message handlers -- thanks John!), but this CBC is failing one of our 
existing tests. It looks like the problem is in CLP, as CLP seems to be 
returning an incorrect objective value for the following LP problem:

\Problem name: eclipse3

Minimize
   C1

Subject To
R1: C1 + C2 >= 7
R2: - C2 + C1 = 0

Bounds
C1 free
C2 free

End

The objective should be 3.5, but 0.0 is returned.

I have been able to reproduce this problem using the clp executable --
by import(ing) the LP file and then solve.

This is from CBC 2.8 that I downloaded yesterday. The problem was not in 
the earlier CBC 2.8 that I was using, which was probably downloaded 
about a year ago.

Is this a problem in CLP, or am I doing something wrong?

Thanks in advance for any help/information!

Cheers,

Kish