The same problem and the same question, i am trying to get descendants towns for a region of france:
select woeid,name from geo.places.descendants where ancestor_woeid='7153319' and placetype='7'
I got this error:
true
<![CDATA[http://where.yahooapis.com/v1/place/7153319/descendants.type(7);start=0;count=1000]]>
171
169
32181
<results/>
if you can help us, it would be great , thanks.