UMG animations not working in packaged build

Development Programming & Scripting UI
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1

When I package my project in the 4.15 preview all of my UMG animations stop working. I’ve tracked it down to the template for the animation not having any segments/tracks and it just not getting rebuilt. It works fine in PIE because the template is force regenerated at MovieSceneSequenceTemplateStore.cpp:11 but that’s behind a WITH_EDITORONLY_DATA so doesn’t occur in a packaged build.

I’ve tried making a repro project but the animations work fine with a new project or even creating a new 4.14 project and upgrading it. I also tried creating a new UMG widget in my project (animation doesn’t play) and then migrating it to a clean project (animation does play). This seems to be a problem with my project specifically but luckily I was able to delete all my content and source code and the error still occurs. Here’s a copy of my completely stripped down project for testing: Repro project

2

Hello kgamble,

I have a couple of questions for you that will help narrow things down a bit further.

Quick questions:

  1. What platform are you currently packaging for?
  2. If you set Blueprint Nativization Method to “Disabled” (can be found in project settings), does this issue still occur?
3

I’m packaging for Win32. Trying it with Blueprint Nativization turned off does fix the problem in my project and causes it in a new project, guess that was the step I was missing.

Looks like I can just exclude any widgets that play animations from being nativized until this is fixed. Thanks.