# Typo in generated .cpp file preventing build, Unreal 5.6.1 FMOD Plugin Ver. 2.03.09

**URL:** <https://qa.fmod.com/t/typo-in-generated-cpp-file-preventing-build-unreal-5-6-1-fmod-plugin-ver-2-03-09/23296>\
**Category:** Unreal Engine\
**Created:** [August 31, 2025, 9:37pm UTC](https://qa.fmod.com/t/typo-in-generated-cpp-file-preventing-build-unreal-5-6-1-fmod-plugin-ver-2-03-09/23296 "2025-08-31T21:37:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Fonics](https://avatars.discourse-cdn.com/v4/letter/f/9fc348/32.png) [@Fonics](https://qa.fmod.com/u/Fonics)\
**Post date:** [August 31, 2025, 9:37pm UTC](https://qa.fmod.com/t/typo-in-generated-cpp-file-preventing-build-unreal-5-6-1-fmod-plugin-ver-2-03-09/23296/1 "2025-08-31T21:37:48Z")

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The file:

Plugins\FMODStudio\Intermediate\Build\Win64\UnrealEditor\Inc\FMODStudio\UHT\FMODCallbackHandler.gen.cpp

Is generating with an #include “allbackHandler.h” instead of “FMODCallbackHandler.h”, preventing a build. Tested on two machines, installing the plugin from scratch each time. I’m able to manually edit the file to fix it temporarily, but this gets reset if I ever need to generate Visual Studio project files.

I’m using Unreal Engine 5.6.1, with the FMOD Studio Plugin version 2.03.09 for Unreal 5.6. I have also tested the plugin version 2.03.08, which has the same issue.

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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 4, 2025, 2:11am UTC](https://qa.fmod.com/t/typo-in-generated-cpp-file-preventing-build-unreal-5-6-1-fmod-plugin-ver-2-03-09/23296/2 "2025-09-04T02:11:36Z")

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This is a bug in UE5.6.1 and we have a fix ready for our next release: [Compile error with UE 5.6.1 - #7 by cameron-fmod](https://qa.fmod.com/t/compile-error-with-ue-5-6-1/23237/7)