[Coin-discuss] non-optimal solutions from Osi

[Kish Shen]

Hi,

Over the last years, we have developed an interface to MP solvers for the 
Constraint Logic Programming language ECLiPSe. Currently it is interfaced to 
CPLEX and XPRESS, and I am currently extending it to OSI. Mainly I would like 
to use CLP and CBC, but obviously the advantage of using OSI is to allow the 
use of other solvers as well.

 I wonder if anyone could help me with several questions I have:

1) Is there anyway to cause the solving process to timeout? I could not find a 
way to specify this in the OSI Doxygen docs.
2) When the solving of a problem is aborted before arriving at the optimal 
solution, is there any generic way of a) telling the problem is feasible 
(i.e. the solving process have found a non-optimal primal feasible solution),
and b) accessing this non-optimal solution
[In CPLEX/XPRESS, there are many status/return codes from the solving process, 
and with which you can determine if there is a suboptimal solution available 
for the different problem types (LP/MIP) and solving methods (primal/dual 
Simplex, barrier), but it is not clear to me how I can do the equivalent via 
OSI]

Thanks in advance for any help/information!

Kish Shen