String rqlRequest = "<IODATA loginguid='" + logonGuid + "' sessionkey='" + sessionKey + "'>"
+ "<PROJECT><EXPORTPACKET action='copy' guid='" + oldPckg.getPublicationPackageGuid() + "' name='" + newPckgName
+ " '/>" + "</PROJECT></IODATA>";
// call cms and ignore response (no parsing)
client.callCmsWithoutParsing(rqlRequest);
// get newly created package
PublicationPackage newPckg = project.getPublicationPackageByName(newPckgName);
// further actions on newPckg
}