I have several saved poses for Miki(she draws an export error in UVmapper on rToe). Anyway, if I use said poses on a new Miki or a cr2, I inevitably get the "incompatable" error. So it was saved in pose. Why? Can't say. Perhaps hitting Miki with a V3 pose earlier on...then saving the bug with the cr2. I'm guessing. Easiest way is to make a fresh pose and re-export. I have gotten this message with V3 too.