504 : Restart not allowed with active security mechanism

Explanation

The connection to the FTP server is protected by a security mechanism (for example, TLS). While the connection is protected, the restart of a failed data transfer is not allowed.

System action

FTP continues.

User response

Possible responses can be the following ones:
  • Reissue the data transfer command to transfer all of the data of file.
  • Close the connection, reconnect without a security mechanism in place, and then issue the restart command.

System programmer response

None.