Hi John
I'm not sure I have all the answers.

Was the song file you set up a new song, that you just started since upgrading?

Could you explain in more details the steps you took when you mentioned: "I go through the songfile sequence and get an i/o error at the end"

Songs from 2013 will work in 2014, you do not need to create new songs just to run in 2014

Have you tried "Return to Factory Settings" from the Opt. menu?

I suspect that the new songfile is corrupted, That's why I'm interested to know of its origin.

Give us a little more information and somebody will be able to assist, I feel sure.

Regards
Trevor

BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones