This parameter contains the Reconnect Option select character that is present on the logon panel. You can change the value of the Reconnect Option select character using this parameter. The maximum length of this field is one byte. The only allowable values are the character 'S' and ' '. If this option is 'S', TSO/E attempts to resume a logon session that was interrupted. If this option is 'S' and there is no disconnected session, the user is logged on normally. If this option is ' ', TSO/E starts a new logon session.