Has anyone else had issues uploading iMotionPlus files?

I have a Morph Prop of a Tape Measure tool. In order to get Morph capabilities in iClone, it is implemented as a Avatar with the morphs being triggered by Expressions. This I have done many times and it works like a charm.

However, in this particular case I also created two iMotionPlus actions for the prop. I have tested these motions and they work like a charm.

However, when I tried to upload the Avatar and iMotionPlus files, it rejected the iMotionPlus files. There was no issue with the file name of these files (as far as I can tell), so it seems that iMotionPlus files are not accepted by the Content Uploader. Is this the case?

If so, how can I provide my content? I checked and if I provide the project file, it does not seem possible to save any applied iMotions as iMotions. It seems the user would have to Collect Clip and save that as an iMotionPlus file. I am guessing that if this was an actual character, one would create a Persona and add the motions to the Persona? Would that be the correct method of providing my content? 

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