no no ........well you could actually :o) but poser will build new ones so no only if you have an obj error, delete it and poser will build a new one.....you see the first time it loads an obj it takes ages as it builds the rsr but next time it'll load the rsr faster than an obj........unless the rsr got corrupt as in your case.....NEVER delete the rsr in the poser4 folder thats posers engine :o)......Steve