Search location with (*) Asterix returns error 6000

I have URL

http://where.yahooapis.com/geocode?q=War*&appid=XXXXXX&flags=JT&count=10&locale=en_US

Location, q parameter has * at the end of string

Placefinder service returns {"@lang":"en-US","ResultSet":{"@version":"2.0","@lang":"en-US","Error":"6000","ErrorMessage":"internal error","Locale":"en-US","Found":"0","Quality":"0"}}

Error 6000.

Search with asterix worked before, but now does not now.