# Occasional error

**URL:** <https://forums.ankiweb.net/t/occasional-error/25158>\
**Category:** Help\
**Created:** [December 5, 2022, 11:41am UTC](https://forums.ankiweb.net/t/occasional-error/25158 "2022-12-05T11:41:52Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![relevartt](https://avatars.discourse-cdn.com/v4/letter/r/e79b87/32.png) [@relevartt](https://forums.ankiweb.net/u/relevartt)\
**Post date:** [December 5, 2022, 11:41am UTC](https://forums.ankiweb.net/t/occasional-error/25158/1 "2022-12-05T11:41:52Z")

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Hi, I’m occasionally getting an error, but much too infrequent to say much about it. Today I copied the message which is this:

Error  
An error occurred. Please start Anki while holding down the shift key, which will temporarily disable the add-ons you have installed.  
If the issue only occurs when add-ons are enabled, please use the Tools \> Add-ons menu item to disable some add-ons and restart Anki, repeating until you discover the add-on that is causing the problem.  
When you’ve discovered the add-on that is causing the problem, please report the issue to the add-on author.  
Debug info:  
Anki 2.1.54 (b6a7760c) Python 3.9.7 Qt 5.15.2 PyQt 5.15.5  
Platform: Windows 10  
Flags: frz=True ao=True sv=3  
Add-ons, last update check: 2022-12-04 22:49:56

Caught exception:  
Traceback (most recent call last):  
File “aqt.main”, line 253, in on\_focus\_changed  
File “aqt.hooks\_gen”, line 2766, in **call**  
File “aqt.main”, line 750, in on\_focus\_did\_change  
File “aqt.reviewer”, line 174, in refresh\_if\_needed  
File “aqt.reviewer”, line 203, in \_redraw\_current\_card  
File “anki.cards”, line 68, in load  
File “anki.\_backend.generated”, line 1811, in get\_card  
File “anki.\_backend”, line 146, in \_run\_command  
anki.errors.NotFoundError

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**Author:** ![pwintz](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/pwintz/32/10112_2.png) [@pwintz](https://forums.ankiweb.net/u/pwintz)\
**Post date:** [December 6, 2022, 12:16am UTC](https://forums.ankiweb.net/t/occasional-error/25158/2 "2022-12-06T00:16:05Z")

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Did you have any add-ons enabled when the error appeared?

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**Author:** ![dae](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/dae/32/65_2.png) [@dae](https://forums.ankiweb.net/u/dae)\
**Post date:** [December 6, 2022, 10:37am UTC](https://forums.ankiweb.net/t/occasional-error/25158/3 "2022-12-06T10:37:50Z")

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Please follow the steps on [When problems occur - Frequently Asked Questions](https://faqs.ankiweb.net/when-problems-occur.html)

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**Author:** ![relevartt](https://avatars.discourse-cdn.com/v4/letter/r/e79b87/32.png) [@relevartt](https://forums.ankiweb.net/u/relevartt)\
**Post date:** [December 9, 2022, 8:07am UTC](https://forums.ankiweb.net/t/occasional-error/25158/4 "2022-12-09T08:07:50Z")

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Yes I have only two: “Add Table”, and “Image Occlusion Enhanced”.

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**Author:** ![relevartt](https://avatars.discourse-cdn.com/v4/letter/r/e79b87/32.png) [@relevartt](https://forums.ankiweb.net/u/relevartt)\
**Post date:** [December 9, 2022, 8:09am UTC](https://forums.ankiweb.net/t/occasional-error/25158/5 "2022-12-09T08:09:37Z")

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Thank you but the problem then is that this only happens like 1/50 times… So even if I start in Safe Mode, it’s hard to tell whether it worked for that reason or not. But I’ll try to remember to do it, who knows.

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**Author:** ![system](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/1X/8f1279ababc5879d54e4838989f606cfe55af8c7.jpeg) [@system](https://forums.ankiweb.net/u/system)\
**Post date:** [January 8, 2023, 8:09am UTC](https://forums.ankiweb.net/t/occasional-error/25158/6 "2023-01-08T08:09:51Z")

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