The following query is invalid because it is missing the Navigation parameter (N):

Nf=Price|LT+9

This following query is incorrect because of an invalid dimension (the Food dimension is misspelled as Foo):

N=0&Nf=Foo|LT+11

The following query, which has an incorrect number of values for the GT function, is also incorrect:

N=0&Nf=Price|GT+20+30