Unreal Engine Issues

UE-62410

Swapping between Multiple Cloth Skeletal Meshes and Animation Classes in a Character Blueprint causes the Engine to crash

Swapping between Multiple Cloth Skeletal Meshes and Animation Classes in a Character Blueprint causes the Engine to crash

Description

When changing Cloth Skeletal Meshes and Animation Blueprints on a Character it will cause the Engine to crash during PIE. This is a regression from 4.19.2 (CL-4033788) as it was working as expected in that version.

This issue was reported and tested in 4.20.1 (CL-4233996) and reproduced in Main 4.21 (CL-4247867)

Steps to Reproduce
  1. Download and open the attached project
  2. Press Play
  3. Press 'R'. You might have to do this twice

Results: The Editor crashes

Expected: The character changes its Skeletal Mesh and Animation Class.

Callstack
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff862d2dc50 NvClothPROFILE_x64.dll!`anonymous namespace'::generateCones() [d:\build\++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\nvcloth\src\swcollision.cpp:164]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff862d2fbe6 NvClothPROFILE_x64.dll!nv::cloth::SwSolver::SimulatedCloth::Simulate() [d:\build\++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\nvcloth\src\swsolver.cpp:292]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff862d30787 NvClothPROFILE_x64.dll!nv::cloth::SwSolver::simulateChunk() [d:\build\++ue4+release-4.20+physx_compile\sync\engine\source\thirdparty\physx3\nvcloth\src\swsolver.cpp:161]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff8716e8720 UE4Editor-ClothingSystemRuntime.dll!FClothingSimulationNv::Simulate() [d:\build\++ue4\sync\engine\source\runtime\clothingsystemruntime\private\clothingsimulationnv.cpp:672]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff8753775dd UE4Editor-Engine.dll!FParallelClothTask::DoTask() [d:\build\++ue4\sync\engine\source\runtime\engine\private\skeletalmeshcomponentphysics.cpp:2969]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff87537d8c0 UE4Editor-Engine.dll!TGraphTask<FParallelClothTask>::ExecuteTask() [d:\build\++ue4\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:829]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff87397137c UE4Editor-Core.dll!FTaskThreadAnyThread::ProcessTasks() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:936]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff873972570 UE4Editor-Core.dll!FTaskThreadAnyThread::ProcessTasksUntilQuit() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:801]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff87397c6f5 UE4Editor-Core.dll!FTaskThreadBase::Run() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:516]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff873db6abc UE4Editor-Core.dll!FRunnableThreadWin::Run() [d:\build\++ue4\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff873db1707 UE4Editor-Core.dll!FRunnableThreadWin::GuardedRun() [d:\build\++ue4\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:33]
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff8df761fe4 KERNEL32.DLL!UnknownFunction []
[2018.08.02-11.30.28:420][286]LogWindows: Error: [Callstack] 0x00007ff8e05ecb31 ntdll.dll!UnknownFunction []

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Duplicate
ComponentUE - Simulation - Physics
Affects Versions4.20.1, 4.21
Target Fix4.21
CreatedAug 2, 2018
ResolvedAug 8, 2018
UpdatedAug 9, 2018
View Jira Issue