Prim parenting issues since maya-usd 0.23

[jufrantz]

Describe the bug

We encounter issues while parenting multiple prims with USD references. It seems to be a regression between maya-usd 0.22 and 0.23.

• Maya outliner is not refreshed after parenting action.
• Only the first selected prim is really re-parented.
• Undo stack is broken after the action.

Also, very similar problems occur with group command / Ctlr+G. I can file another issue if needed.

Steps to reproduce

• In attached maya-usd-23_parenting_issues.zip, open maya scene scene.ma.

  • scene.ma contains a mayaUsdProxyShape created from scene.usd layer.
  • scene.usd defines a simple hierarchy with multiple references to asset.usd.

• Select ufe items in this order /World/Group1/Asset1 and /World/Group1/Asset2 (both referencing asset.usd) and /World/Group2 (the wanted parent).

• Click on menu Edit/Parent or use shortcut P

• Notice that

  • Maya outliner is out of date, you need to collapse/expand Group1 and World to see the new parenting.
  • Asset2 was not parented, parent action was only applied to first selected prim Asset1.
  • Next undo will issue this error

// Error: line 1: Undo was not successful.  Damaged undo/redo information has been flushed.

• The bug can also be reproduced executing following script

import maya.cmds
maya.cmds.parent(
    "|usdProxy|usdProxyShape,/World/Group1/Asset1", 
    "|usdProxy|usdProxyShape,/World/Group1/Asset2",
    "|usdProxy|usdProxyShape,/World/Group2"
)

Specs (if applicable):

• Linux CentOS 7.8
• gcc 9.3.1
• Maya 2023.3
• Maya USD 0.23.0
• Pixar USD 22.11

[santosd]

Hi @jufrantz ,
You are correct this was a regression in Maya USD 0.23.0, however, the issue was resolved in Maya USD 0.24.0 our most current release. I tried it out in Maya 2023.3 and I was able to verify that the issue no longer happens in Maya 0.24.0. Please give it a try and let me know if you have any questions.
-David

[jufrantz]

Hello @santosd.

Good to know. Thank you for the information and for testing this case. We'll try 0.24 soon.

A bit unrelated, but to anticipate the way we would deploy next version : maya-usd 0.24 dropped support for Maya 2020. Is it the case even if we build maya-usd from sources. Or does it only mean that the prebuilt release packages are no longer targeting 2020 ? Sorry if I missed this information elsewhere.

Thank you once again,
Julien

[seando-adsk]

You should be able to build your own 0.24 targeting Maya 2020 as support for it was removed after we released 0.24. Future releases will require at least Maya 2022.

Sean

[santosd]

I will go ahead and close this out since the issue is no longer in 0.24.0, but if you have any further questions on this feel free to reply and reopen or if a new issue comes up feel free to log it.