search with (uidNumber>=1900) got "text: inappropriate matching request"

Hello. I am not quiet sure why a search with (uidNumber>=1900) got "text: inappropriate matching request".

I've checked that uidNumber is mentioned and commented in nis.schema on my openldap-2.4.10 on Debian. Thus it should be a built-in attribute. It is of integerMatch

Can you give some hint how to search for all users with uid greater than 1900? Thanks!

Test case:

$ ldapsearch -xD uid=supertuxadmin,ou=contacts,ou=china,dc=ahk,dc=de -b ou=contacts,ou=china,dc=ahk,dc=de '(uidNumber>=1900)' o uidNumber # extended LDIF # # LDAPv3 # base <ou=contacts,ou=china,dc=ahk,dc=de> with scope subtree # filter: (uidNumber>=1900) # requesting: o uidNumber #

# search result search: 2 result: 0 Success text: inappropriate matching request

# numResponses: 1