Add-on not loaded: "bl_ext.blender_org.looptools", cause: No module named "bl_ext.blender_org.looptools" #124457

New Issue

MACHIN3 · 2024-07-10T15:34:23+02:00

MACHIN3 commented

2024-07-10 15:34:23 +02:00

System Information
Operating system: Linux-6.6.10-76060610-generic-x86_64-with-glibc2.35 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 3080 Ti Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14

Blender Version
Broken: version: 4.2.0 Beta, branch: blender-v4.2-release, commit date: 2024-07-06 04:49, hash: 11b1919bcfe3

Short description of error
A bit of a niche issue, I came across this while automating addon installation via the extensions platform.

See https://www.youtube.com/watch?v=Z8DBqi1Im8M for a quick demo how to reproduce this issue.

Steps

install addon from the Blender exstensions repo
save your preferences with the addon activated, and quit Blender
remove the addon from disk, in my case I remove the entire extensions folder at .../.config/blender/4.2/extensions/
start Blender and it will rightfully detect that the addon is missing
trying to install it now, again from the repo will throw the error above
despite that it still was installed successfully. even though it cant be activated from the addons tab either
restarting Blender resolves this

**System Information** Operating system: Linux-6.6.10-76060610-generic-x86_64-with-glibc2.35 64 Bits, X11 UI Graphics card: NVIDIA GeForce RTX 3080 Ti Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14 **Blender Version** Broken: version: 4.2.0 Beta, branch: blender-v4.2-release, commit date: 2024-07-06 04:49, hash: `11b1919bcfe3` **Short description of error** A bit of a niche issue, I came across this while automating addon installation via the extensions platform. ![image](/attachments/63c09cc3-62d4-41fb-8d2b-946a5a37baab) See https://www.youtube.com/watch?v=Z8DBqi1Im8M for a quick demo how to reproduce this issue. **Steps** * install addon from the Blender exstensions repo * save your preferences with the addon activated, and quit Blender * remove the addon from disk, in my case I remove the entire extensions folder at `.../.config/blender/4.2/extensions/` * start Blender and it will rightfully detect that the addon is missing * trying to install it now, again from the repo will throw the error above * despite that it still was installed successfully. even though it cant be activated from the addons tab either * restarting Blender resolves this

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MACHIN3 added the

labels 2024-07-10 15:34:24 +02:00

Nika Kutsniashvili commented

2024-07-10 16:18:35 +02:00

There were lot of changes during alpha and beta that might have caused this, and I'm assuming it did. Can you delete extensions folder from /blender/4.2/ and let Blender generate it again? And then test.

There were lot of changes during alpha and beta that might have caused this, and I'm assuming it did. Can you delete extensions folder from `/blender/4.2/` and let Blender generate it again? And then test.

MACHIN3 commented

2024-07-10 16:26:41 +02:00

I mean I tested exactly like this. I always deleted the entire extensions foldwer. Which would then result in the missing addon message, as expected, but also lead to the failed activation after new installation. But again, a simple Blender restart and the addon activates automatically.

This is not a major issue at all, just wanted to mention it, as I was confused as to what was going on until I noticed it has to do with the saved prefs of the addon being activated, when it actually was no longer found on disk.

I mean I tested exactly like this. I always deleted the entire extensions foldwer. Which would then result in the missing addon message, as expected, but also lead to the failed activation after new installation. But again, a simple Blender restart and the addon activates automatically. This is not a major issue at all, just wanted to mention it, as I was confused as to what was going on until I noticed it has to do with the saved prefs of the addon being activated, when it actually was no longer found on disk.

Nika Kutsniashvili commented

2024-07-10 16:31:04 +02:00

Sorry I didn't make myself clear. Don't delete loop tools folder, delete entire extensions folder and let Blender generate it again. I had couple of problems myself because during beta lot of things changed about how and which files Blender recognizes, and regenerating them fixed it.

Sorry I didn't make myself clear. Don't delete loop tools folder, delete entire `extensions` folder and let Blender generate it again. I had couple of problems myself because during beta lot of things changed about how and which files Blender recognizes, and regenerating them fixed it.

MACHIN3 commented

2024-07-10 16:37:56 +02:00

This is what I'm saying Nika :) I removed looptools by deleting the entire extensions folder every time. I even show it in the video. This is how I reproduce the issue.

I have just tested by just removing the looptools folder within extensions/blender_org, and that does not seem to have the problem.

This is what I'm saying Nika :) I removed looptools by deleting the entire extensions folder every time. I even show it in the video. This is how I reproduce the issue. I have just tested by just removing the looptools folder within extensions/blender_org, and that does not seem to have the problem.

YimingWu commented

2024-07-11 15:48:22 +02:00

I believe blender now expects extension directory to exist and deleting that dir may lead python to not search in that directory hence it can't find the extension. Installing the extension would ensure the dir exists, and restarting with the dir already existing will have no issue.

@dfelinto any ideas? Should we forcefully ensure the dir exists upon starting blender?

I believe blender now expects `extension` directory to exist and deleting that dir may lead python to not search in that directory hence it can't find the extension. Installing the extension would ensure the dir exists, and restarting with the dir already existing will have no issue. @dfelinto any ideas? Should we forcefully ensure the dir exists upon starting blender?

YimingWu added

and removed

labels 2024-07-11 15:48:38 +02:00

Campbell Barton referenced this issue from a commit

2024-07-12 08:22:57 +02:00

Fix #124457: Error enabling installed extension after failure to load