The client sent a command to the FTP server. An error occurred when the FTP server attempted to parse the command and its arguments.
command_name is the name of the command that could not be parsed.
The server rejects the command_name command.
Report the error to the system programmer.
Inspect the command that the server rejected. If the command is syntactically valid, activate the FTP server trace, re-create the problem, save the system log for problem determination, and report the problem to IBM®. Otherwise, report the error to the provider of the FTP client software.