The client logged in to the server as anonymous attempted to issue the FTP command command. The FTP server was running with the user-written exit routine FTCHKCMD, and the FTCHKCMD user exit prevented the user from issuing command command.
The command is rejected. Control is returned to the client for further command processing.
See the preceding 500-UX- reply (if generated by the user exit) for an explanation of the rejection. Contact the system programmer for the server system for more information.
If necessary, change the user exit FTCHKCMD to allow the user to issue the command. The client must end the FTP session and then reconnect to the server in order to pick up changes to the user exit routines.