IMO deleting rsr files should be done one at a time, as problems occur. A well-intentioned DAZ tech once recommended that you delete ALL of them from Geometries, claiming "you don't need them." I did that...disasterous results, and I had to reinstall the app. I'm not as technically astute on this issue as others, but from experience, think you should only do it with specific rsr files that cause this error. 320MB RAM is not insufficient memory. :-)