Replication Server enables row count validation by default and automatically displays error messages and performs default error actions in reaction to different row count validation errors such as row count mismatch. You can configure the Replication Server error class to enable different error actions.
A connection associates itself with two error class types—a data server error class and a Replication Server error class. You must associate a Replication Server error class with a connection before Replication Server can query the Replication Server error class for overrides to the default Replication Server error actions. You can associate a connection with only one Replication Server error class. However, you can associate one Replication Server error class with multiple connections. Use the set replication server error class parameter for the create connection and alter connection commands to associate a Replication Server error class with a connection.
When Replication Server responds to errors, it looks first for the Replication Server error class assigned to the connection. If Replication Server does not find the Replication Server error class, Replication Server uses the default rs_repserver_error_class error class assigned to the server.