Search Filter (greater than)

["Chris Andrew" <candrew@oxspring.com>]

I'm getting no results (and an error in the logs) for this search filter:

# ldapsearch -x -b "dc=example,dc=com" "(uidNumber>=500)"

# search result
search: 2
result: 0 Success

Log message:
conn=220 op=1 SRCH base="dc=example,dc=com" scope=2 filter="(badfilter)"

Obviously, there are records that have a uidNumber greater than 500.

Any ideas?

Thanks

Chris