Re: [Help-glpk] gplk branch and cut question

[Xypron]

Hello David,

rows can only be generated when
reason = GLP_IROWGEN or
reason = GLP_ICUTGEN.

cf. http://lists.gnu.org/archive/html/bug-glpk/2010-03/msg00000.html

Crash free catching of errors in the callback routine has been added in 
glpk-java 1.0.13.

Best regards

Xypron

David Pérez wrote:
> 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.
>