CWR and JPG's missing (is it configuaritions?)

Wonder if anybody has experienced this before.

I have SW 2007 SP2 Premium with Cosmos Prof.

I ran several studies on a solid model, when I've come backtoreview  the results the CWR and JPG files are missing.Nowthere could be several causes

1.) Somebody deleted the files - very doubtful
2.) Issue with configurations
3.) Change in model has affected the study
4.) The part was copied into a seperate folder and opened,couldthis have effected the previous folder and studies.

Any help would be greatly appreciated.SolidworksSimulation