STEPS TO REPRODUCE
1. Launch iClone 6
2. Apply embed content Non-Human Horse
3. Drag a random iMotion to Horse (e.g. Pesade)
4. Go to Timeline > Collect Clip, select from Frame 1 to Frame 300, right-click and choose “Add Motion to Library”, then save it to desktop
5. Click “New Project” on Toolbar, apply Non-Human Horse again
6. Drag the saved Motion clip to Horse

ACTUAL RESULT
Error message “Cannot replace motion. Invalid file or avatar not compatible” appears

EXPECTED RESULT
The saved motion can be loaded to iClone 6