[BCP] CoinError after "LP: Returned children to TM. Waiting for new node."

[Michael Poss]

I forgot to say that I'm using BCP 1.2.3.

Best,

Michael.

2010/1/22 Michael Poss <mposs at ulb.ac.be>:
> Hi all,
>
> I'm writing a branch-and-cut-and-price algorithm with BCP.
> My problem has two sets of variables : x variables (core variables,
> binary), and f (algorithmic variables, real).
> Then, I generate the f-variables through column generation and branch
> on the x-variables, so that I did not modify the branching procedure.
>
> Here is my problem.
> The algorithms adds cuts and variables, and branches correctly a few
> times. Eventually, while trying to branch, the following happens:
>
> ..........
> LP: Default select_branching_candidates() executed.
>
> LP: Starting strong branching:
>
> LP:   Presolving: (3,0.5799,100.0000 /  ) [2663.6553,2,3] [3316.9006,64,2]
> LP: Default compare_presolved_branching_objects() executed.
> LP:   Deleting 7 rows from the matrix.
> LP: Default set_actions_for_children() executed.
>
> LP:   SB selected candidate 0 out of 1.
>
> LP:   The selected object is: (3,0.5799,100.0000 /  ) [2663.6553,2,3] [2622.6500
> ,64,2]
> LP: Default set_user_data_for_children() executed.
> LP node written in file lpnode.lp
> LP:   Returned children to TM. Waiting for new node.
> terminate called after throwing an instance of 'CoinError'
> Aborted
>
> Any help would be very welcome.
>
> Best,
>
> Michael Poss.
>