The FTP client issued command command to the FTP server. The FTP server's file structure is structure. Command command is not supported for file structure structure.
The command is rejected. FTP waits for the next command from the FTP client.
If possible, issue the FTP STRUCTURE subcommand to set the file structure to a value valid for command. Then issue command again. Please see z/OS Communications Server: IP User's Guide and Commands for information on valid file structures for command.
None.