Editor Crashes when swapping skeletal mesh

Development Programming & Scripting Blueprint
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1

In my Character Blueprint - I have a function when I pickup a new armour set - I swap the skeletal mesh of my character and run an anim montage where he does a flex animation. The New skeletal Mesh uses the same anim BP.

I am confused on what is happening because sometimes it works, 90% of the time the editor crashes…

Assertion failed: !bPostEvaluatingAnimation [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/Components/SkeletalMeshComponent.cpp] [Line: 2273] PostAnimEvaluation already in progress, recursion detected for SkeletalMeshComponent [CharacterMesh0], AnimInstance [ABP_GK_C_0]

It was happening in 4.20 and also 4.24

If anyone has any clues about this - would greatly appreciate it :slight_smile:

2

My guess - might be that there’s an error happening when I swap the skeletal mesh - the anim bp is still running on tick - and gets confused when I swap out the mesh

3

Hey buddy,

Maybe try and stop the anim instance before you swap out the skeleton mesh, let me know if this works.

4

That did work for me, just get mesh, pause anims, swap, anims, run montage

5

What did you do exactly ? I have to same crash, but can’t repair it. I get a notify from my montage and when I catch the notify I want to swap mesh. But even after calling Character->GetMesh()->GetAnimInstance()->StopAllMontages(0); I still have the !bPostEvaluatingAnimation crash.

1 Like
6

I got seldom crashes when setting physical asset for Metahuman in runtime.

That’s what I did:

  1. Disabled Post Process Blueprint for all skeletal meshes in BP setting (and I see no changes in pawn behavior)
  2. Before setting physical asset I Stop all skeletal meshes
  3. I set delay for 1 tick before and after set physical asset

After many tests I see no crashes (so far).