JobSchedulerFTPSend: alternative connection and the transfer is successful but the job returns exit 1

I configured a wrong user (ftp_user) and a right user (ftp_alternative_user).
The connection with the "ftp_user" failed.
The connection with the "ftp_atrenative_user" was successful and the transfer too.

Nvertheless the job returns an exit 1 (see attached log).