<![CDATA[C4D crashes when removing node via MSG_MENUPREPARE]]>What am I doing wrong? Need to remove the node under certain circumstances via MSG_MENUPREPARE but it crashes the C4D.
Is it possible to somehow bypass this behavior? Is this a bug?


import c4d
import os


class OBug_Check(c4d.plugins.ObjectData):

    def Message(self, node, type, data):
        if type == c4d.MSG_MENUPREPARE:
            node.Remove()

        return True


if __name__ == "__main__":
    c4d.plugins.RegisterObjectPlugin(id=1000003,
                                     str="Bug Check",
                                     g=OBug_Check,
                                     description="OBug_Check",
                                     info=c4d.OBJECT_GENERATOR,
                                     icon=None)
]]>http://developers.maxon.net/forum/topic/15375/c4d-crashes-when-removing-node-via-msg_menuprepareRSS for NodeTue, 16 Jun 2026 09:26:55 GMTSun, 11 Feb 2024 17:16:51 GMT60<![CDATA[Reply to C4D crashes when removing node via MSG_MENUPREPARE on Tue, 13 Feb 2024 13:49:20 GMT]]>Hi @merkvilson I would say what you are trying to do is not well supported and MSG_MENUPREPARE was never designed for the current node to be removed.

The correct way to do so, is to return False within your NodeData.Init method, this way the object is not created and therefor you do not have to remove it.

Cheers,
Maxime.

]]>http://developers.maxon.net/forum/post/73760http://developers.maxon.net/forum/post/73760Tue, 13 Feb 2024 13:49:20 GMT<![CDATA[Reply to C4D crashes when removing node via MSG_MENUPREPARE on Sun, 11 Feb 2024 18:35:12 GMT]]>Hi @merkvilson ,
try to add check for main thread scope:

    def Message(self, node, type, data):
        if c4d.threading.GeIsMainThread() and type == c4d.MSG_MENUPREPARE:
            node.Remove()
]]>http://developers.maxon.net/forum/post/73736http://developers.maxon.net/forum/post/73736Sun, 11 Feb 2024 18:35:12 GMT