Crash on duplicating matinee and reloading map in editor

Hi there,

I have seen a few similar issues raised but the users were not able to repro them.

We have a 100% reproducable crash when we do the following:

  1. Open our map which has a matinee in it
  2. Duplicate this matinee
  3. Edit the duplicated matinee (doesn’t seem to matter what we edit)
  4. Save map and close editor
  5. Reload editor and open map - crash on load

The crash occurs when creating some InterpData which is editor only code, thus loading the map in game is fine.

I have a video and two map files I can provide to show the crash, and I can repro using this content in the base engine 4.2.0. I couldn’t attach them here due to size/file type restrictions.

This crash is 100% for us and repros on multiple machines.

The assert is: Assertion failed: !Obj->HasAnyFlags(RF_NeedLoad|RF_NeedPostLoad|RF_ClassDefaultObject) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.2\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 1751]

I’ve attached an image of our matinee in the matinee editor.

Howdy Ben.Driehuis,

Thank you very much for your report on the matinee crashing. The issue had previously been entered into our bug database. Here is the alternate bug post:
This issue has been resolved and will be fixed in the 4.3 update.

Thanks for the report and have a great day!