You can not choose Save... from the File menu, or use command-S, in a new ClarisWorks, ClarisImpact or ClarisDraw document until you have added at least one text or graphic object to the document, or in some other way modified the document. This is true even if you have chosen Save As..., given the file a name, closed the file and opened it again. While it may be disconcerting to hit command-S and have no response, there is little reason to choose Save... for an empty, unmodified document.