The FTP server received an invalid TYPE command. FTP tried to continue with the current data transfer type, but an internal error occurred and the current data type is no longer valid.
The FTP connection with the client ends.
Reconnect to the FTP server and issue the desired TYPE command. For information about valid TYPE parameters, see z/OS Communications Server: IP User's Guide and Commands. If this reply is received repeatedly, make a note of the last few FTP commands you have issued that cause this result, and contact your system programmer
Contact the IBM® Support Center with output from the FTP server trace, if available.