I have successfully downloaded, modified and uploaded memory settings.

I thought that I could save such a file, and then use it for a subsequent upload if that became necessary.

What I did: I used what I had saved from a previous download, modified it, and then attempted to upload it. I got an error:

Failed to communicate with radio: Radio did not ack block 0

Can I only upload the same file that I downloaded? If that's the case, why would one save a file?

Thanks,

Peter KO6R