You may get the below error code when attempting to transfer files with TFTP.
Error code 1: File not found
If you do get this error the issue is likely that the file does not exist on the server you are trying to place the file on using TFTP. If you are on a linux server you can just touch the file name on the TFTP server before transferring the actual file via TFTP.
TFTP: Trivial File Transfer Protocol