add:  throw Components.interfaces.calIWcapErrors.WCAP_NO_ERRNO; 
context: function getWcapXmlErrno( xml ){    if (xml == undefined)        throw new Error("no XML!");    var item = xml.getElementsByTagName("X-NSCP-WCAP-ERRNO").item(0);    if (item)        return parseInt(item.textContent);    else {        // xxx todo: throw new Eror("missing element X-NSCP-WCAP-ERRNO!");        //           cs currently may forget to send X-NSCP-WCAP-ERRNO on        //           some commands, maybe fixed in later versions. WTF.        return 0;    }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/318a30b964defb311d9cf0464a3354a583a7e8f0/calWcapErrors.js/clean/calendar/providers/wcap/calWcapErrors.js