The set_max method in MixedIntegerLinearProgram() does not seem to work correctly if the maximum value specified is 0. Specifically, the input....
Q = MixedIntegerLinearProgram(); xx = Q['xx']; Q.set_min(xx,0); Q.get_min(xx)
... returns null, but ....
Q = MixedIntegerLinearProgram(); xx = Q['xx']; Q.set_min(xx,3); Q.get_min(xx)
... works fine. Anyone know what's going on here?