Touch a file
Some times you have to touch(create) a file before transferring using tftp. As Didier said, you are not being very clear on your scenario.
I can create this scenario as example:
When backing up (copying)a Cisco IOS through a tftp server in a linux box, you first have to touch the file (create a file in your linux box) before transfer, otherwise you will get: (No such file or directory).
In your case, it seems you have to touch a file locally.