# FMOD Studio: Encountered Error: ERR\_VERSION The version of this file format is not supported

**URL:** <https://qa.fmod.com/t/fmod-studio-encountered-error-err-version-the-version-of-this-file-format-is-not-supported/14730>\
**Category:** Unity\
**Created:** [May 31, 2019, 12:27am UTC](https://qa.fmod.com/t/fmod-studio-encountered-error-err-version-the-version-of-this-file-format-is-not-supported/14730 "2019-05-31T00:27:38Z")\
**Posts on this page:** 1\
**Showing post:** 23

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**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\
**Post date:** [September 29, 2020, 3:58am UTC](https://qa.fmod.com/t/fmod-studio-encountered-error-err-version-the-version-of-this-file-format-is-not-supported/14730/23 "2020-09-29T03:58:57Z")

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The github repo has not been updated to FMOD 2.01.

This can be an issue if you are using assembly definitions:

> [@Error CS0117: 'VERSION' does not contain a definition for 'dll'](https://qa.fmod.com/t/error-cs0117-version-does-not-contain-a-definition-for-dll/16217/2):
>
> In release 2.01 there are source files under Assets/Plugins/FMOD/platforms that need to be part of the FMODUnity assembly, otherwise player builds fail with lots of errors about FMOD.VERSION and FMOD.Studio.STUDIO\_VERSION missing a definition for ‘dll’. The docs are being updated with this information in the next release.

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_[View the full topic](https://qa.fmod.com/t/fmod-studio-encountered-error-err-version-the-version-of-this-file-format-is-not-supported/14730)._