Unable to move assets between levels

I am trying to copy or move everything from one level into another and am having difficulty.

Level 1 was imported by a coworker from a pre-existing 3ds file. I want to merge Level 1 from his project into my project’s level 0. It seems easy, right? It should be and I have tried a bunch of different approaches found in these pages The latest, and the one that seems most straightforward is :

  • from his project, “migrate” the folder into my project.
  • At the OS level, copied the .umap file, because that’s not included in the migration.
  • In my project, added his Level 1 in my Levels tab
  • right clicked on Level 1 and “select actors”
  • right clicked on Level 0 (Persistent Level) and “Move Selected Actors to Here”

…And the assets all disappear from my Project. I would expect that the “Level” column in the “World Outlner” would change and that would be that.

I’m sure there’s a simple explanation and solution for this but I have hit the point of frustration. What am I doing wrong?

I know this is a remedial question and I feel silly having to ask it, but what am I doing wrong?

Thanks!

I believe this is a bug.

It worked when I did it a few at a time. When I tried to move 700 items it behaved as mentioned above.