### $URL$
import traceback
from sfa.util.faults import *
+from sfa.util.namespace import *
from sfa.util.method import Method
from sfa.util.parameter import Parameter, Mixed
from sfa.util.debug import log
def call(self, cred, xrn, origin_hrn=None):
user_cred = Credential(string=cred)
+ hrn = urn_to_hrn(xrn)[0]
#log the call
if not origin_hrn: