I found the problem! It was a series of tiny files that edge animate spews out occasionally throughout the folder which interfered with the article file uploading to DPS. I have no idea why they are created, but deleting them seems to solve the problem.
I’ve tried the solution you’ve outlined, unfortunately it doesn’t seem to work in 2015.
I failed to mention previously that this animation I’m working on is interactive, would that have any bearing on the workaround you’ve mentioned? I assume I would simply check “allow interactivity” but I tried it both ways with no luck.
I’ve had similar issues on a separate, non-interactive animation as well.