I'm having a problem with Catalyst Prepare (2015.1.2.178).
I've created a Storyboard, and I'm trying to copy the files to another folder (I've created a brand new folder, selected "copy only between in/out points", "copy all related files", and "copy with verification".
Whenever I try to copy the files an error comes up: "Failed to copy files. Destination contains video files. Please specify another folder or create a subfolder."
I try that, and the error comes up again. The only way to copy withou the area is to copy each clip in the story board one by one which not only takes forever but negated the purpose of the storyboard.
This error is supposed to prevent copying files from a known-directory structure (example: AVCHD) to a folder that contains other video clips/folders, due to issues with the extra files (xml, etc.) associated with those directories.
Just for test purposes, instead of selecting "Copy all related media", can you try selecting "Copy clips only" and see if that works? I am curious if that would make a difference. I am guessing that will work since you indicated copying each clip individually was successful.