rem: throw new Error("no URI!"); 
add: throw new Components.Exception("no URI!"); 
context:     getCommandUrl:    function( wcapCommand )    {        if (this.sessionUri == null)            throw new Error("no URI!");        // ensure established session, so userId is set;        // (calId defaults to userId) if not set:        this.getSessionId();        return (this.sessionUri.spec +                wcapCommand + ".wcap?appid=mozilla-calendar");    },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/30d02961047b21c123c6585c71a085e40f3e6fa5/calWcapSession.js/buggy/calendar/providers/wcap/calWcapSession.js