[Coin-discuss] OsiClp proper use of initialSolve and resolve, setObjective

[Sebastian Nowozin]

Hello Lou,

thanks for the reply.  I isolated the code in question and attach a file 
which reproduces three separate issues with OsiClpSolverInterface, Osi 
version 0.98.2.  I marked the issues with "BUG" in the source file.

I think the first two issues are caused by a constraint system with zero 
rows, but the last issue is the one I am facing in my real code.

Issue 1.  The optimal objective returned in the first iteration is zero, 
although the optimal solution is -0.3.

Issue 2.  enableFactorization() and enableSimplexInterface() fail if the 
constraint system has zero rows.

Issue 3.  getColSolution() returns NULL.

I will file these as issues into the Clp tracker in an hour or so, or 
latest tomorrow morning.

Thanks,
Sebastian

-------------- next part --------------
A non-text attachment was scrubbed...
Name: bug1.cpp
Type: text/x-c++src
Size: 3304 bytes
Desc: not available
URL: <http://list.coin-or.org/pipermail/coin-discuss/attachments/20080522/5b3339b1/attachment.bin>