Assertion Failed

[Mind-Brain]

@rECOMBINAToR

LogWindows: Error: appError called: Assertion failed

Hey @rECOMBINAToR!

Try this thread! It’s sounding like an NRE or corruption somewhere, as the AnimSequence.cpp is an engine file.

Hope that helps!

LogWindows: Error: appError called: Assertion failed: IsThisNotNull(this, "UStruct::IsChildOf")

Hello there @WeberSystems! Checking through your log, it sounds like the cook procress is stumbling with a broken blueprint, considering the line below: Assertion failed: IsThisNotNull(this, "UStruct::IsChildOf") File: Class.cpp Line: 2758 UE is tacking with a null reference, most likely due a blueprint not properly updating to 5.6.1. So, the easiest fix would be to run “Validate Assets” on your Blueprint folders and watch for failures. After that, you can force a clean compile for any affect…