Recently, I had a case where the customer reported that his rig “exploded” when he tried to load and apply a .motion file.
Since the customer was from EMEA (that’s Autodesk-speak for Europe/Middle East/Africa), I figured this was most likely this is because of the Number format in the Windows Region and Language settings. I was able to reproduce the problem by changing my Region and Language Format at Germany. Except that my character didn’t explode; rather, it ended up 121800 units from the origin looking like a Star Trek transporter malfunction.
To fix this:
Try changing the Decimal Symbol to a period (.) and the Digit Grouping Symbol to a comma (,).
Or switch the Format to English (United States).