[Cbc] integer constraints violated in Cbc (trunk branch) solution
Kish Shen
kisshen at cisco.com
Wed Aug 20 00:25:27 EDT 2008
Hi,
I have just downloaded the trunk branch of Cbc earlier today (19 Aug)
via svn, and I tested it with our ECLiPSe interface to Cbc/Clp solvers,
on an Intel Mac running Mac OS 10.5. I ran our test suite through it,
and have one problem -- one of the MIP problem, which should be
infeasible, returned a solution. Checking the solution shows that some
of the integer variables were assigned non-integer values, up to about
0.3 away, so it is not a precision problem.
I cannot test the problem on another platform, as I don't have gcc 4
installed on those platforms, so I don't know if the problem occurs in
other platforms.
I have generated the logged C code for the problem and have reproduced
the problem. Please let me know (I guess probably John again?) and I can
send this. Thanks in advance!
Cheers,
Kish
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