Duplicate objects are created when a library overridden collection has new objects added that are then also overridden. #101679

New Issue

stephen thomas · 2022-10-07T16:26:08+02:00

stephen thomas commented

2022-10-07 16:26:08 +02:00

System Information
Operating system: macOS-12.6-arm64-arm-64bit 64 Bits
Graphics card: Apple M1 Apple 4.1 Metal - 76.3

Blender Version
Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: 0759f671ce
Worked: (newest version of Blender that worked as expected)

Short description of error
Duplicate objects are being created when new objects that have been added to a collection that is linked to another file are given a library override.

This is a simplified & more refined version of this report: https://developer.blender.org/T101466

Exact steps for others to reproduce the error

duplicate-bug.mp4

Default scene - Delete camera and light.
Add armature and cube
Set armature as parent of cube
Save as 'props.blend'
Create a new file, delete all objects
Link the 'props' collection from 'props.blend'
Click on Object > Relations > Make Library Override
Save as 'shot.blend'
Open 'props.blend'
Add Suzanne object to the 'props' collection
Add an armature object to the 'props' collection
Set armature as parent of Suzanne
Save
Open 'shot.blend'
Select Suzanne armature
Click on Object > Relations > Make Library Override
Duplicates of the Suzanne mesh object and Suzanne armature have been created.
Save 'shot.blend'
Reload 'shot.blend'
The duplicates are still there. An error message appears saying:
"//Data corruption: data-block 'OBAarmature.002' is using another local data-block ('OBArmature.001') as library override reference
Data corruption: data-block 'OBSuzanne.001' is using another local data-block ('OBSuzanne') as library override reference//"

shot-01.blend

props.blend

**System Information** Operating system: macOS-12.6-arm64-arm-64bit 64 Bits Graphics card: Apple M1 Apple 4.1 Metal - 76.3 **Blender Version** Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: `0759f671ce` Worked: (newest version of Blender that worked as expected) **Short description of error** Duplicate objects are being created when new objects that have been added to a collection that is linked to another file are given a library override. This is a simplified & more refined version of this report: https://developer.blender.org/T101466 **Exact steps for others to reproduce the error** [duplicate-bug.mp4](https://archive.blender.org/developer/F13628112/duplicate-bug.mp4) - Default scene - Delete camera and light. - Add armature and cube - Set armature as parent of cube - Save as 'props.blend' - Create a new file, delete all objects - Link the 'props' collection from 'props.blend' - Click on Object > Relations > Make Library Override - Save as 'shot.blend' - Open 'props.blend' - Add Suzanne object to the 'props' collection - Add an armature object to the 'props' collection - Set armature as parent of Suzanne - Save - Open 'shot.blend' - Select Suzanne armature - Click on Object > Relations > Make Library Override - Duplicates of the Suzanne mesh object and Suzanne armature have been created. - Save 'shot.blend' - Reload 'shot.blend' - The duplicates are still there. An error message appears saying: "//Data corruption: data-block 'OBAarmature.002' is using another local data-block ('OBArmature.001') as library override reference Data corruption: data-block 'OBSuzanne.001' is using another local data-block ('OBSuzanne') as library override reference//" [shot-01.blend](https://archive.blender.org/developer/F13628117/shot-01.blend) [props.blend](https://archive.blender.org/developer/F13628118/props.blend)

stephen thomas commented

2022-10-07 16:26:08 +02:00

Added subscriber: @stephenthomas

Artur Tavares commented

2022-10-07 16:33:43 +02:00

Added subscriber: @artutava

Artur Tavares commented

2022-10-07 16:33:43 +02:00

It's happening here with some rigs. It simply duplicates objects inside the link to the main collection in the scene.

Richard Antalik commented

2022-10-10 20:22:28 +02:00

Added subscriber: @iss

Richard Antalik commented

2022-10-10 20:22:28 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2022-10-10 20:22:28 +02:00

Following steps strictly I think I need to save file after step 4?
Also I have skipped step 4 and deleted scene content after step 5 after I wasn't able to reproduce for the first time.

I was checking with 3.4 and 3.3 and wasn't able to reproduce exact issue.

Only got info message in info editor:

Object Armature.001 lost data
Object Suzanne lost data

And error in conole:
ERROR (wm.files): C:\Users\blender\git\blender-vdev\blender.git\source\blender\windowmanager\intern\wm_files.c:869 file_read_reports_finalize: 2 local ObjectData and 0 local Object proxies are reported to be missing, this should never happen

Following steps strictly I think I need to save file after step 4? Also I have skipped step 4 and deleted scene content after step 5 after I wasn't able to reproduce for the first time. I was checking with 3.4 and 3.3 and wasn't able to reproduce exact issue. Only got info message in info editor: ``` Object Armature.001 lost data Object Suzanne lost data ``` And error in conole: `ERROR (wm.files): C:\Users\blender\git\blender-vdev\blender.git\source\blender\windowmanager\intern\wm_files.c:869 file_read_reports_finalize: 2 local ObjectData and 0 local Object proxies are reported to be missing, this should never happen`

stephen thomas commented

2022-10-10 22:27:22 +02:00

Thanks for your response Richard.

Following steps strictly I think I need to save file after step 4?

The name of the collection doesn’t really matter, it’s not related to the bug but I thought it might help to understand the context of the bug (e.g. it makes sense that a ‘props’ collection is a collection that can be added to during a production and not be static/locked off). When you create a new file in step 5, it’ll ask you to save anyway.

Also I have skipped step 4 and deleted scene content after step 5 after I wasn't able to reproduce for the first time.

Deleting everything in the scene shouldn’t make a difference to the bug, but it’s what I do in the screen recording and it’s good practice to keep things clean & organised.

Can I ask what you mean when you say ‘for the first time’? The error only occurs after a collection has been linked into the shot file, then new objects added to the linked collection and a library override is added to the new armature object in the shot file. The first time you create the collection and link it into another file shouldn’t show an error.

Only got info message in info editor:

Object Armature.001 lost data
Object Suzanne lost data
And error in conole:
ERROR (wm.files): C:\Users\blender\git\blender-vdev\blender.git\source\blender\windowmanager\intern\wm_files.c:869 file_read_reports_finalize: 2 local ObjectData and 0 local Object proxies are reported to be missing, this should never happen

If you open the shot file attached to this report, yes, it’ll show the errors. This is the result of the bug along with two versions of Suzanne and the rig she’s attached to. If you’d like to reproduce the bug, follow the steps above, or if you’d like granular detail, the video reproduces the bug from scratch, maybe you could follow along to reproduce?

Can I point you to my original bug report here: https://developer.blender.org/T101466. Don’t worry about me asking if new objects should automatically be overridden, I agree that’s a feature request and shouldn’t be in a bug report. Please focus on Omar confirming the duplicate issue.

Please also see this bug report: https://developer.blender.org/T100428. My original bug report was erroneously merged with this one. You’ll see near the end that Bastien confirms the bug and asks me to create a new bug report.

Thanks for your response Richard. > Following steps strictly I think I need to save file after step 4? The name of the collection doesn’t really matter, it’s not related to the bug but I thought it might help to understand the context of the bug (e.g. it makes sense that a ‘props’ collection is a collection that can be added to during a production and not be static/locked off). When you create a new file in step 5, it’ll ask you to save anyway. > Also I have skipped step 4 and deleted scene content after step 5 after I wasn't able to reproduce for the first time. Deleting everything in the scene shouldn’t make a difference to the bug, but it’s what I do in the screen recording and it’s good practice to keep things clean & organised. Can I ask what you mean when you say ‘for the first time’? The error only occurs after a collection has been linked into the shot file, then new objects added to the linked collection and a library override is added to the new armature object in the shot file. The first time you create the collection and link it into another file shouldn’t show an error. > Only got info message in info editor: > >Object Armature.001 lost data >Object Suzanne lost data >And error in conole: >ERROR (wm.files): C:\Users\blender\git\blender-vdev\blender.git\source\blender\windowmanager\intern\wm_files.c:869 file_read_reports_finalize: 2 local ObjectData and 0 local Object proxies are reported to be missing, this should never happen If you open the shot file attached to this report, yes, it’ll show the errors. This is the result of the bug along with two versions of Suzanne and the rig she’s attached to. If you’d like to reproduce the bug, follow the steps above, or if you’d like granular detail, the video reproduces the bug from scratch, maybe you could follow along to reproduce? Can I point you to my original bug report here: https://developer.blender.org/T101466. Don’t worry about me asking if new objects should automatically be overridden, I agree that’s a feature request and shouldn’t be in a bug report. Please focus on Omar confirming the duplicate issue. Please also see this bug report: https://developer.blender.org/T100428. My original bug report was erroneously merged with this one. You’ll see near the end that Bastien confirms the bug and asks me to create a new bug report.

Richard Antalik commented

2022-10-10 22:37:47 +02:00

I saw errors from your file. I just wanted to clarify after I wasn't able to reproduce, I need to construct written steps anyway. will try following the video instead and see what I missed if I can reproduce.