Looks like you’ve just uncovered a bug in maya. I say this because if I
comment out the “del mdg_mod” line:
import pymel.core as pmimport maya.OpenMaya as OpenMaya
handles_to_delete = []for i in xrange(5):
new_nodes = pm.polyCube()
for new_node in new_nodes:
handles_to_delete.append(new_node.__apihandle__())
old_undo_state = pm.undoInfo(q=1, state=1)
pm.undoInfo(state=0)try:
mdg_mod = OpenMaya.MDGModifier()
for moh_node in handles_to_delete:
if moh_node.isValid() is False:
continue
mdg_mod.deleteNode(moh_node.object())
mdg_mod.doIt()
# del mdg_modfinally:
pm.undoInfo(state=old_undo_state)
…then it no longer crashes… however, the viewport still displays the
now-deleted cube(s), even though they don’t exist in the outliner / scene /
etc. Clearly a bug - the viewport is still keeping around references to
deleted objects somehow. (Tested with 2018.1, don’t have a copy of 2018.2
yet.)
Not much to do other than submit a bug report to autodesk about it.
Also - if possible, please try to include independently-executable code
samples when you’re looking for help troubleshooting. It makes it much more
likely you’ll get help… frequently, if I see something like “self.a_roots”
in a code snippet, I won’t even bother trying to troubleshoot.
- Paul
On Thu, Jan 4, 2018 at 1:51 AM Rémi Deletrain <[email protected]>
wrote:
Hi all,
>
> I trying too to delete a node. But I have a crash on doIt of MDGModifier
> From what I read here, the reason would come from the management of
> pointers...
>
> But I don't know how to fix that or convert to exception.
> My process create many nodes. When I want to delete root of one of them
> maya have brutal crash
>
> Here is my code:
> # Delete node
> mdg_mod = OpenMaya.MDGModifier()
> for moh_node in self.a_roots:
> if moh_node.isValid() is False:
> continue
> mdg_mod.deleteNode(moh_node.object())
> mdg_mod.doIt()
> del mdg_mod
>
> I Use MObjectHandle and my node is valid and alive. I have a same problem
> on removeAttribute of MFnDependencyNode.
> I try to set undo to false. When undo is false delete node works as long
> as outliner is not opened. When I open outliner maya crash...
>
> You have any solution ?
>
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