Not sure about what maya does internally, but as a workaround (and maybe as the
only solution), you can make sure to delete all the children before deleting
the parent ?
from maya.api import OpenMaya as om
# create
fn = om.MFnDagNode()
hroots = []
for i in xrange(2):
oroot = fn.create("transform")
hroot = om.MObjectHandle(oroot)
hroots.append(hroot)
fnChild = om.MFnDagNode()
for j in xrange(2):
ochild = fnChild.create("transform")
fn.addChild(ochild)
# delete
mdg_mod = om.MDGModifier()
for moh_node in hroots:
if not moh_node.isValid():
continue
fnRoot = om.MFnDagNode(moh_node.object())
# make sure the children are removed prior to deletion
for j in xrange(fnRoot.childCount()):
fnRoot.removeChildAt(0)
mdg_mod.deleteNode(moh_node.object())
mdg_mod.doIt()
del mdg_mod
It looks like as soon as maya looses the target of a pointer, it crashes, like
to avoid the memory leak (yay ^^) ? But by deleting the children first, you
make sure nothing is left behind \o/
On Thursday, January 4, 2018 at 1:51:49 AM UTC-8, Rémi Deletrain 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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