Segmentation fault (core dumped)

[sherly1389]

Hello,
I am getting error as 'Segmentation fault (core dumped)
' when I am trying to use measage queue from flow graph of gnu radio companion.

code: abc.connect(sel f.watcher, Qt.SIGNAL("new_ plot_data(PyQt_ PyObject, PyQt_PyObject)" ),abc.plot_data )

Please let me know how to get rid of it.