Even then it’s not feature complete since you still cannot edit imported STEP files, that’s a feature locked out to not cannibalize the sales of spaceclaim, the actual cad package design spark is based of.
These are the official tutorials posted on SCDM’s website. They are categorized based on experience with the software.
http://www.spaceclaim.com/en/Support/Tutorials/Essentials.aspx
Space Claim Direct Modeller (SCDM) is a real time saver if used as intended!
Was the model originally created in SpaceClaim, or was it imported?
Chances are that you need to repair the model geometry before trying to do a shell. See http://www.spaceclaim.com/en/Solutions/GeometryRepair.aspx