[Clp] How to get integral solution for totally unimodular matrix?

[Lasse Kliemann]

I tried using CLP via 'OsiClpSolverInterface.initialSolve()' to 
solve a bipartite matching problem, which is known to have a
totally unimodular matrix. So, Simplex method should give only 
integral solutions AFAIK. Indeed, this works well with GLPK's 
'glp_simplex(...)'. However, CLP on several occasions delivers 
clearly non-integral solutions. What could be the reason for 
this? Is there a configuration parameter to change that?

Thank you!
Lasse
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