Quote - It is not renumbering them, had it just been that, I would have just removed the numbers again. sworn alot about it beiing possessed and moved on from there.  It is deleting the ERC entirely.

Does the conformer contain an actor named "lThigh"? If I remember correctly, when the file being saved (in Poser) does not contain an actor with the same name as in the slaving code, then the slaving code will be deleted. That's the only reason I can think of at the moment why the slaving code would be completely deleted. As noted by Cage, when saving the conformer the figure numbering will be updated in the slaving code, and that would stop the figure woking as a super-conformer.