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Dear all,<br>
<br>
I'm using SCIP-3.1.2 with SoPlex 2.2.0 on windows (but this problem
also arises with SCIP-3.1.1 or SCIP-3.1.0).<br>
<br>
The problem arises when I want to solve certain MIPs with absolute
gap limit.<br>
I have attached a small example file. In this MIP the optimal
solution is equal to 0, and of course SCIP can solve easily. But
when I set absolute gap to 11 (that is, set <i>limits/absgap</i>=11)
SCIP terminates according to gap limit, but without solution:<br>
<br>
<i>SCIP Status : solving was interrupted [gap limit reached]</i><i><br>
</i><i>Solving Time (sec) : 0.01</i><i><br>
</i><i>Solving Nodes : 0</i><i><br>
</i><i>Primal Bound : +7.12610000000000e+000 (0 solutions)</i><i><br>
</i><i>Dual Bound : +0.00000000000000e+000</i><i><br>
</i><i>Gap : infinite<br>
<br>
</i>So, what I have got is trivially not correct, I guess.<br>
How can we reach gap limit without a feasible solution? And why do
SCIP set finite primal bound without any feasible solution? (Okay,
it is indeed an upper bound for the optimum (according to bounds 0
<= x417 <= 7), and it is lower than the absolute gap, but SCIP
should not say that the gap limit reached since we have not got any
solution.)<br>
<br>
Best regards,<br>
Marko<br>
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