[postgis-users] Problem with numb_sub_objects()

[Bill Thoen]

I'm using 1.1.6  PostGIS but find that when I try to use 
numb_sub_objects() I get an error message saying that the function does 
not exist. I'm using it like this:
select numb_sub_objects(geom) from mytable;

And is this any different from NumGeometries(), which does work?