# \[4.21\] FMOD Crash on loading - trying to recreate class 'AFMODAmbientSound' outside of hot reload!

**URL:** <https://qa.fmod.com/t/4-21-fmod-crash-on-loading-trying-to-recreate-class-afmodambientsound-outside-of-hot-reload/14276>\
**Category:** Unreal Engine\
**Created:** [December 25, 2018, 3:05pm UTC](https://qa.fmod.com/t/4-21-fmod-crash-on-loading-trying-to-recreate-class-afmodambientsound-outside-of-hot-reload/14276 "2018-12-25T15:05:40Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Acrossfy](https://avatars.discourse-cdn.com/v4/letter/a/cc9497/32.png) [@Acrossfy](https://qa.fmod.com/u/Acrossfy)\
**Post date:** [December 25, 2018, 3:05pm UTC](https://qa.fmod.com/t/4-21-fmod-crash-on-loading-trying-to-recreate-class-afmodambientsound-outside-of-hot-reload/14276/1 "2018-12-25T15:05:40Z")

</div>

Hi there!

I’ve got the same issue as @jakelong [here](https://qa.fmod.com/t/ue4-crashes-due-to-fmodambient-hot-reload/13992), but on latest vanilla engine from launcher (4.21) with latest FMOD (1.10.10) on C++ project. It happens if you’re starting project with debug attached via Visual Studio on this project when another UE4 project (without FMOD) is already open. I know it kinda specific, but it doesn’t happen with any other UE4 plugin. So, please take a look at this.

---

<div class="post-metadata">

**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:** [January 6, 2019, 11:59pm UTC](https://qa.fmod.com/t/4-21-fmod-crash-on-loading-trying-to-recreate-class-afmodambientsound-outside-of-hot-reload/14276/2 "2019-01-06T23:59:53Z")

</div>

So far I have not been able to reproduce this, are you able to give me a list of steps to reproduce this?  
I have tried using two projects, building from Visual Studio and also attaching the debugger.