Hi. I got a very weird problem with cduncan's mapply hint: In a python product method i do following: source_ = self.aq_acquire(self.source) data = mapply(source_, self.REQUEST.args, self.REQUEST, call_object,1, missing_name, dont_publish_class, self.REQUEST, bind=1) Where data most of the time contains the result of the method, in the case of ZSQLMethod objects, this will be a result instance. Now the __call__ method of DA (defined in Shared.DC.ZRDB.DA) is defined as follows: def __call__(self, REQUEST=None, __ick__=None, src__=0, test__=0, **kw): """Call the database method ...""" And src__ gets sometimes set to ZServerHTTPResponse('') which evaluates to a true value and will return the source of the method instead of calling it. :/ Now i don't know how this happens, this actually doesn't look to be intended, as src__ is expected to be 0 or 1, but definitely not a Response object. Hints or solutions? Thanks Christian -- Christian Theune - ct@gocept.com gocept gmbh & co.kg - schalaunische strasse 6 - 06366 koethen/anhalt tel.+49 3496 3099112 - fax.+49 3496 3099118 mob. - 0178 48 33 981 reduce(lambda x,y:x+y,[chr(ord(x)^42) for x in 'zS^BED\nX_FOY\x0b'])