On Wed, Aug 3, 2011 at 2:59 PM, Fernando Barbat <[email protected]> wrote:
> Hi,
>
> In documentation
> (http://docs.geoserver.org/stable/en/user/filter/function_reference.html) it
> says that a "not" filter function exists. However, GeoServer throws this
> exception when I try to use it.

This error might be reported because of two reasons:
- spelling error (not your case it seems
- the wrong number of arguments is passed to the function (we can have
two functions
  with the same name but different number of arguments).
  "not" takes a single expression inside

Can we see how you expressed your filter?

Cheers
Andrea


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