Metasounds Crashing During Playback

[LM_prod_43]

I am working on a University project in which I replace/alter the audio in the Ancient Valley Sample game from the FAB marketplace. However, when I open any Metasound Blueprint from the Content Drawer and attempt to play the sound, it crashes after a few seconds. I am unable to upload the complete crash files, but the header of the crash log is as follows:

Error: appError called: Assertion failed: TryAllocateInternal(InSize, AllocationAlignment, AllocationResourceType, AllocationData) [File:D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12PoolAllocator.cpp] [Line: 375]

Has anyone had a similar experience and can help me determine why this keeps crashing? I hear playback during gameplay testing no problem, I am just unable to play them via blueprint editor. If I select the play button while the metasound is still unopened in the content drawer, it plays without issue as well.

[FrostyJas]

Hi there @LM_prod_43

Welcome to the Unreal Engine Community! Have you tried swapping to DirectX 11 and see if it happens then? I’ve saw other users run into this issue recently, I believe. Let me know if that works.

[LM_prod_43]

Hello @FrostyJas,

This did the trick, thank you so much!

Best,

LM

[LM_prod_43]

While this has allowed me to edit and playback the metasounds, I now find that the static meshes that make up the landscape are not rendering or are missing. Could this be related to switching from Directx12 to Directx11?

[FrostyJas]

Hi there @LM_prod_43

I’m glad I could help! In regards to the meshes, swapping to DX12 can cause that. I’ve saw it before. Are you using Nanite, by chance?