Including AudioCaptureComponent causing packaging errors

Development Programming & Scripting C++
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1

Hello! I’m working on a plugin for Unreal Engine 5.5 (precompiled build). Everything compiles and runs fine in the editor, but when I try to package the plugin, I get the errors listed below.

After some testing, I’ve narrowed the issue down to a custom audio capture component I created, which inherits from UAudioCaptureComponent. Just including "AudioCaptureComponent.h" in the plugin seems to trigger the packaging failure.

Has anyone run into something similar or have insight into what’s going on? Any help would be greatly appreciated.

UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Async\AsyncWork.h(253): error C2039: '__faststorefence': is not a member of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Windows\WindowsPlatformMisc.h(97): note: see declaration of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Async\AsyncWork.h(340): error C2039: '__faststorefence': is not a member of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Windows\WindowsPlatformMisc.h(97): note: see declaration of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Async\AsyncWork.h(502): error C2039: '__faststorefence': is not a member of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Windows\WindowsPlatformMisc.h(97): note: see declaration of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Async\AsyncFileHandle.h(126): error C2039: '__faststorefence': is not a member of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Windows\WindowsPlatformMisc.h(97): note: see declaration of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Async\AsyncFileHandle.h(189): error C2039: '__faststorefence': is not a member of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Windows\WindowsPlatformMisc.h(97): note: see declaration of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Async\AsyncFileHandle.h(194): error C2039: '__faststorefence': is not a member of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Windows\WindowsPlatformMisc.h(97): note: see declaration of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Async\AsyncFileHandle.h(200): error C2039: '__faststorefence': is not a member of 'FWindowsPlatformMisc'
UATHelper: Package Plugin Task (Windows): C:\Program Files\Epic Games\UE_5.5\Engine\Source\Runtime\Core\Public\Windows\WindowsPlatformMisc.h(97): note: see declaration of 'FWindowsPlatformMisc'
2

I had a similar issue in UE5.4 (source build) where the engine failed to find the audio component package, even though it was previously working.

The solution that worked for me was to add “AudioMixer” to the project.Build.cs Public Dependency Modules and “SignalProcessing” to Private Dependency Modules. Hope this helps someone.