The problem isn’t with an asset that was bought from the store (as mentioned in the previous answer) - it’s definitely an engine problem.
Our characters were working fine in 4.19, but in 4.20 I’m getting frequent editor crashes with the same data, all of which relate to cloth array allocation :
[2018.10.19-10.06.58:517][969]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION writing address 0x2c794afc
[2018.10.19-10.06.58:517][969]LogWindows: Error:
[2018.10.19-10.06.58:517][969]LogWindows: Error: [Callstack] 0x00007ffba9d172d5 NvClothPROFILE_x64.dll!physx::shdfnd::Array<nv::cloth::`anonymous namespace'::VertexDistanceCount,nv::cloth::NonTrackingAllocator>::growAndPushBack() [d:\bs_engint\ue4source\engine\source\thirdparty\physx3\pxshared\src\foundation\include\psarray.h:766]
[2018.10.19-10.06.58:517][969]LogWindows: Error: [Callstack] 0x00007ffba9d25900 NvClothPROFILE_x64.dll!nv::cloth::ClothGeodesicTetherCooker::createTetherData() [d:\bs_engint\ue4source\engine\source\thirdparty\physx3\nvcloth\extensions\src\clothgeodesictethercooker.cpp:548]
[2018.10.19-10.06.58:517][969]LogWindows: Error: [Callstack] 0x00007ffba9d230c5 NvClothPROFILE_x64.dll!nv::cloth::FabricCookerImpl::cook() [d:\bs_engint\ue4source\engine\source\thirdparty\physx3\nvcloth\extensions\src\clothfabriccooker.cpp:601]
The callstack is long,so I’ve snipped the middle out, but this is where it originates:
[2018.10.19-10.06.58:517][969]LogWindows: Error: [Callstack] 0x00007ffbb8e77234 UE4Editor-Engine.dll!UWorld::InitializeActorsForPlay() [d:\p4\engineintegration\ue4source\engine\source\runtime\engine\private\world.cpp:3557]
[2018.10.19-10.06.58:517][969]LogWindows: Error: [Callstack] 0x00007ffbb825ad56 UE4Editor-Engine.dll!UGameInstance::StartPlayInEditorGameInstance() [d:\p4\engineintegration\ue4source\engine\source\runtime\engine\private\gameinstance.cpp:368]