Mcommandmessage::addcommandoutputcallback Keeps Crashing My Maya (2)

[diskhub]

hi everyone,
i am just wondering whether anyone has used addCommandOutputCallback method from MCommandMessage class.
It keeps crashing my MAYA everytime i run it.

A simple python and it doesn't work:
It works only for addCommandCallback, which is not what i want.

import maya.OpenMaya as OM

def cmdCallback(message,messageType,data):
if messageType == OpenMaya.MCommandMessage.kDisplay:
print ">>>"+message.__str__()

dummyText = ''
d = OM.MCommandMessage.addCommandOutputCallback(cmdCallback, dummyText )

HELPPPP

[carl-keifer]

The reason that this crashes is because you try to print to the terminal in a callback that captures commands sent to the terminal

try stopping the callback before you print.

or you create an infinite loop of command callbacks.