Yes it is the same each time amd ive tried it over and over it it does the same thing at the same time. So the peron making the tune needs to do what?

It was sent to me via email then I downloaded the attachment. I saved it to a file I could find later. I select send tune file to tool on the express tab.i select the tune and I select the original backup file. It loads about 3/4 of the way then says byte 315933 of 315858 and my tool says unable to ...

hi i bought a custom tune and when writing it to my trinity my tool says unable to write 1024 bytes. what do i do???