We´ve tested the java version of branch and cut API (glpk 4.43). We´ve an iterative method in which we´ve to obtain an integer solution and enforce it with a new constraint (the problem is a bilevel one). The new constraint is based on the last integer solution and a dual problem associated to a second level restriction.
When we add a new row to the original problem (the master one) on the callback (called when GLP_IBINGO reason occurs) the API give us the following error: Assertion failed: tree!=tree glpapi01.c: 293 we suppose that we are making a wrong use of the API. Thanks in advance. David. _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
