ORA-31223: DBMS_LDAP: cannot open more than string LDAP server connections
Cause: An attempt was made to open more than the maximum allowed LDAP server connections.
Action: Free unused connections.

ORA-31228: DBMS_LDAP: invalid MOD_ARRAY
Cause: An attempt was made by a PL/SQL module to use a MOD_ARRAY which is not valid and might have already been freed.
Action: Check the MOD_ARRAY in PL/SQL module involving DBMS_LDAP.

ORA-31398: DBMS_LDAP: Shared servers are not supported.
Cause: The session executing functions from the DBMS_LDAP package is being handled by a shared server in the Database.
Action: Use dedicated database sessions to execute functions in the DBMS_LDAP package.

ORA-31404: all input parameters are null
Cause: All input parameters are null. At least one property must be altered.
Action: Call the procedure again, making sure that all the required parameters have been specified. Ensure that at least one parameter is not null. Refer to user documentation for the correct way of calling this procedure.

ORA-31409: one or more values for input parameters are incorrect
Cause: One or more of the inputs to the procedure had invalid values.
Action: Identify the bad parameter(s) and supply correct values to the procedure.

ORA-31224: DBMS_LDAP: invalid LDAP session
Cause: An attempt was made by a PL/SQL module to use an LDAP session which is not valid and might have already been closed.
Action: Check the LDAP session handle in PL/SQL module involving DBMS_LDAP.