I've only recently started using the Gather Project feature, as I'm trying to consolidate some folders and don't want my projects screwed up. I successfully gathered up a dozen projects I expect to render in higher resolutions one day, but am having an issue with just one of them. There are no Errors or Warnings, the gather window reports that all assets are ready to gather, but it just says "There was a problem" when I try to gather it.
What could be making a project with no errors unable to be gathered? It's an old TG2 project. I would just bite the bullet and redo all the plant populations from the new directories, but population instancing apparently does not show up in a project made with TG2.