# A fatal error occured

**URL:** <https://forums.ankiweb.net/t/a-fatal-error-occured/25441>\
**Category:** Help\
**Created:** [December 17, 2022, 10:46am UTC](https://forums.ankiweb.net/t/a-fatal-error-occured/25441 "2022-12-17T10:46:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Philofreak](https://avatars.discourse-cdn.com/v4/letter/p/ad7895/32.png) [@Philofreak](https://forums.ankiweb.net/u/Philofreak)\
**Post date:** [December 17, 2022, 10:46am UTC](https://forums.ankiweb.net/t/a-fatal-error-occured/25441/1 "2022-12-17T10:46:29Z")

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I hope this is the correct forum to report this error!  
I don’t need help, as the app was successfully started after this crash - i just try to help the anki-developers.

A fatal error occurred, and Anki must close. Please report this message on the forums.  
Anki 2.1.49 (dc80804a) Python 3.8.6 Qt 5.14.2 PyQt 5.14.2  
Platform: Windows 10  
Flags: frz=True ao=False sv=?  
Add-ons, last update check: 2022-12-16 19:22:21

Caught exception:  
Traceback (most recent call last):  
File “aqt\taskman.py”, line 101, in _on\_closures\_pending  
File “aqt\taskman.py”, line 71, in   
File "aqt\operations\_init_.py", line 214, in wrapped\_done  
File “concurrent\futures\_base.py”, line 432, in result  
File “concurrent\futures\_base.py”, line 388, in _get\_result  
File “concurrent\futures\thread.py”, line 57, in run  
File "aqt\operations\_init.py", line 199, in wrapped\_op  
File “aqt\editor.py”, line 544, in   
File “anki\notes.py”, line 191, in fields\_check  
File “anki\_backend\generated.py”, line 355, in note\_fields\_check  
File "anki\_backend\_init_.py", line 126, in \_run\_command  
pyo3\_runtime.PanicException: called `Result::unwrap()` on an `Err` value: PoisonError { … }

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**Author:** ![NameLessGO](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/namelessgo/32/34298_2.png) [@NameLessGO](https://forums.ankiweb.net/u/NameLessGO)\
**Post date:** [December 17, 2022, 6:09pm UTC](https://forums.ankiweb.net/t/a-fatal-error-occured/25441/2 "2022-12-17T18:09:49Z")

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Thanks for sharing the error prompt, Anki is currently on [2.1.55](https://github.com/ankitects/anki/releases/tag/2.1.55) and one of the features of the version is better error logs in case of problems

Most likely the problem that was happening in 2.1.49 was fixed in recent versions

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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 16, 2023, 6:10pm UTC](https://forums.ankiweb.net/t/a-fatal-error-occured/25441/3 "2023-01-16T18:10:43Z")

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Closed on January 16, 2023, 6:10pm UTC

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