Issues saving bodies into new part

Has anyone seen issues when using the insert body into new part tool? Basically, once I insert body into a new part and save, I typically break references. For some reason now when I do that it gives me the ever so help full error "An Invalid Argument Was Encountered." After clicking ok on the error, I loose a number of the solid bodies that I had tried to save, they disappear from the UI and from the solid bodies folder, but the Stock-XXXX feature is still in the feature manager and has a rebuild icon next to it. Rebuilding does nothing to solve the problem.

SolidworksParts And Features