$06FF Error T43 ('08 G8)

I've been browsing the forum a bit and have been seeing some other examples of this checksum error, and am assuming it is caused by it being previously tuned. I'm trying to load my trans, it and it throws this error at the end.

What exactly in the file creates this error? I would like to give him a heads up on the underlying cause, as well as aid in my own education.

I appreciate the help!

Are you able to post up the tune you are trying to flash?

My apologies. I thought I had it uploaded.

Here you go, this version will flash ok (it was an issue with a previous tune in there).

Cheers
Ross

Awesome; thank you very much!