Error Code
531
Problem Solving
15
018-717
[Cause] An LDAP server protocol error occurred as a result of the Address Book operation. The 
server returned RFC2251 Result Message No "17" (undefined type) for Address Book 
query.
[Remedy] The LDAP server has an attribute problem. Have your network administrator confirm the 
LDAP server status.
018-718
[Cause] An LDAP server protocol error occurred as a result of the Address Book operation. The 
server returned RFC2251 Result Message No "18" (inappropriate matching) for Address 
Book query.
[Remedy] The LDAP server has an attribute problem. Have your network administrator confirm the 
LDAP server status.
018-719
[Cause] An LDAP server protocol error occurred as a result of the Address Book operation. The 
server returned RFC2251 Result Message No "19" (constraint violation) for Address Book 
query.
[Remedy] The LDAP server has an attribute problem. Have your network administrator confirm the 
LDAP server status.
018-720
[Cause] An LDAP server protocol error occurred as a result of the Address Book operation. The 
server returned RFC2251 Result Message No "20" (attribute exists) for Address Book 
query.
[Remedy] The LDAP server has an attribute problem. Have your network administrator confirm the 
LDAP server status.
018-721
[Cause] An LDAP server protocol error occurred as a result of the Address Book operation. The 
server returned RFC2251 Result Message No "21" (invalid syntax) for Address Book 
query.
[Remedy] The LDAP server has an attribute problem. Have your network administrator confirm the 
LDAP server status.
018-722
[Cause] The machine cannot connect to Google Cloud Print, because of a network error.
[Remedy] Check that the network cable is connected properly. Also check that the environmental 
settings are adequate.
018-723
[Cause] The machine cannot connect to Google Cloud Print, because of a certificate error.
[Remedy] Check that the root CA certificate registered to the machine and the certificate 
verification settings are correct.
018-724
[Cause] The machine cannot connect to Google Cloud Print, because of an SSL communication 
error.
[Remedy] Check the SSL settings.
018-725
[Cause] The user password set in the Kerberos server expired.
[Remedy] Extend the expiration date of the password.
018-726
[Cause] The root (or intermediate) CA certificate on the smart card is not registered on the 
machine.
[Remedy] Register the root (or intermediate) CA certificate on the smart card on the machine.
018-727
[Cause] Authentication by the Kerberos server failed.
[Remedy] Check the certificate on the smart card, and then update the certificate if it is invalid or 
revoked. Also, check whether the certificate is enabled in the server.
Error Code Cause and Remedy