This read-write object drives and reports the state machine of a TFTP client request: setting it to enable(2) triggers the get or put defined by usrTftpClientRequestAction, after which it transitions to getting(3) or putting(4) while in progress, then to normal(1) on success or error(6) on failure, with usrTftpClientRequestErrorString explaining any failure. An admin sets this to enable(2) to kick off a configured file transfer and then polls it to track progress and completion. Seeing this value settle at error(6) after a get attempt tells the admin to check usrTftpClientRequestErrorString for the specific cause, such as an unreachable server.