[BCP] Segfault in OsiClpSolverInterface::clone after fathoming a node in BCP

[Andrea Trautsamwieser]

Hi,

I am using BCP already quite a while but only used variable generation so far. Now I  implemented cuts to strengthen the LP relaxation. However, I obtain the following problem when fathoming a node.

LP:   Forcibly fathoming node in branch().
LP:   Deleting 648 columns from the matrix.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff791ffd8 in OsiClpSolverInterface::OsiClpSolverInterface(OsiClpSolverInterface const&) () from /home/andi/Bcp-1.3.4/build/lib/libOsiClp.so.1

I first thought that my algorithmic cuts are including variables that have been deleted. However, if I customize the function "select_vars_to_delete" of BCP_lp_user to delete nothing the error still occurs.

Thanks a lot for your help.

With kind regards,

Andrea



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