# \[ERR\] assert : assertion: 'mRiffChunk.mType == ChunkType\_Riff && mRiffChunk.mID == id' failed

**URL:** <https://qa.fmod.com/t/err-assert-assertion-mriffchunk-mtype-chunktype-riff-mriffchunk-mid-id-failed/18942>\
**Category:** FMOD Studio\
**Tags:** html5\
**Created:** [June 27, 2022, 4:01pm UTC](https://qa.fmod.com/t/err-assert-assertion-mriffchunk-mtype-chunktype-riff-mriffchunk-mid-id-failed/18942 "2022-06-27T16:01:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Canvas](https://avatars.discourse-cdn.com/v4/letter/c/b487fb/32.png) [@Canvas](https://qa.fmod.com/u/Canvas)\
**Post date:** [June 27, 2022, 4:01pm UTC](https://qa.fmod.com/t/err-assert-assertion-mriffchunk-mtype-chunktype-riff-mriffchunk-mid-id-failed/18942/1 "2022-06-27T16:01:23Z")

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I am running with fmodstudio + Electron + H5, the official example. This error occurs when loading the Bank file。

 ![Screen Shot 2022-06-27 at 23.59.02](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/e/ea74e666228fff72f3fe65b46a896771a5cbbfad.jpeg)

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<div class="post-metadata">

**Author:** ![Canvas](https://avatars.discourse-cdn.com/v4/letter/c/b487fb/32.png) [@Canvas](https://qa.fmod.com/u/Canvas)\
**Post date:** [June 28, 2022, 3:21am UTC](https://qa.fmod.com/t/err-assert-assertion-mriffchunk-mtype-chunktype-riff-mriffchunk-mid-id-failed/18942/2 "2022-06-28T03:21:35Z")

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I use mac book m1 pro. Windows is OK.

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<div class="post-metadata">

**Author:** ![Canvas](https://avatars.discourse-cdn.com/v4/letter/c/b487fb/32.png) [@Canvas](https://qa.fmod.com/u/Canvas)\
**Post date:** [June 28, 2022, 4:14am UTC](https://qa.fmod.com/t/err-assert-assertion-mriffchunk-mtype-chunktype-riff-mriffchunk-mid-id-failed/18942/3 "2022-06-28T04:14:13Z")

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1、

 ![Screen Shot 2022-06-28 at 12.13.25](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/9/919ad91b28732e238ef0a8fa51f56833915d0517.png)  
2、 var fileUrl = “/public/js/”; =》var fileUrl = “public/js/”;

Solution.