Linked proxies "lost data"

Andy Bay commented

2017-08-21 16:19:28 +02:00

There seems to be a problem in Blender in which linked proxy objects start to "lose data".

There is a simple way to test this behavior:

Create a new empty blender scene
Link an object to it (suzanne will do fine)
Make the object a proxy
Choose "make local" --> "all"
Attempt to go to edit mode (won't work)
Save the file and reload it (blender will give a console error with "lost data" and the proxy object disappears)

Here is a video of the problem:

https://youtu.be/iaWOj72dc0Q

This seems to happen with both 2.78 and 2.79

EDIT:

A smaller file: link problem.zip

There seems to be a problem in Blender in which linked proxy objects start to "lose data". There is a simple way to test this behavior: 1. Create a new empty blender scene 2. Link an object to it (suzanne will do fine) 3. Make the object a proxy 4. Choose "make local" --> "all" 5. Attempt to go to edit mode (won't work) 6. Save the file and reload it (blender will give a console error with "lost data" and the proxy object disappears) Here is a video of the problem: https://youtu.be/iaWOj72dc0Q This seems to happen with both 2.78 and 2.79 EDIT: A smaller file: [link problem.zip](https://archive.blender.org/developer/F720752/link_problem.zip)

Andy Bay commented

2017-08-21 16:19:28 +02:00

Author

Changed status to: 'Open'

Andy Bay commented

2017-08-21 16:19:28 +02:00

Author

Added subscriber: @Geminoidi

Bastien Montagne commented

2017-08-21 20:55:40 +02:00

Owner

Added subscriber: @mont29

Bastien Montagne commented

2017-08-21 20:55:40 +02:00

Owner

Please always attach a small and simple .blend file (not a 96MB zipped archive…) to help reproducing the issue, always saves us a tremendous of time.

Please always attach a **small and simple** .blend file (not a 96MB zipped archive…) to help reproducing the issue, always saves us a tremendous of time.

Andy Bay commented

2017-08-21 20:59:23 +02:00

Author

In #52481#453627, @mont29 wrote:
Please always attach a small and simple .blend file (not a 96MB zipped archive…) to help reproducing the issue, always saves us a tremendous of time.

Hi! Sorry about that! You can freely ignore the file, because the problem can also be easily recreated with the six steps I posted.

EDIT: I uploaded a smaller zip now

> In #52481#453627, @mont29 wrote: > Please always attach a **small and simple** .blend file (not a 96MB zipped archive…) to help reproducing the issue, always saves us a tremendous of time. Hi! Sorry about that! You can freely ignore the file, because the problem can also be easily recreated with the six steps I posted. EDIT: I uploaded a smaller zip now

Steffen Dünner commented

2017-08-22 17:06:42 +02:00

Added subscriber: @SteffenD

Andy Bay commented

2017-08-24 09:41:43 +02:00

Author

I'm not so familiar with the bug tracker so please forgive for asking: what does it mean that the status of this is "incomplete"? Are you still waiting for additional input from me?

Bastien Montagne self-assigned this 2017-08-25 12:55:06 +02:00

Bastien Montagne commented

2017-08-25 12:55:06 +02:00

Owner

Sorry, just means none of the devs had time to check again on it ;)

So, what happens here I think is that "making all local" also makes linked mesh data local, and remaps the proxy to use that data. However, a proxy's obdata is ignored at save time, so that localized mesh end up having no user and be discarded, so when opening again proxy data points to inexistent obdata…

Think proxies shall never use local obdata, will see what I can do in localizing process to forbid this to happen.

Sorry, just means none of the devs had time to check again on it ;) So, what happens here I think is that "making all local" also makes linked mesh data local, and remaps the proxy to use that data. However, a proxy's obdata is ignored at save time, so that localized mesh end up having no user and be discarded, so when opening again proxy data points to inexistent obdata… Think proxies shall never use local obdata, will see what I can do in localizing process to forbid this to happen.

Andy Bay commented

2017-08-25 16:10:56 +02:00

Author

Does this mean that it's impossible to make linked proxy objects local? Is the only way forward to re-import everything by appending instead of linking? Or can I still salvage my scene somehow?