Yeah, I started converting and transmitting separately this year.  I don't even remember exactly what the issue was, but I had a federal reject but the state went thru and then we had to amend the state once we got the federal correct.  It was enough of an administrative mess that I'm now willing to invest the extra 30 seconds in "convert" then "transmit" vs. "convert and transmit".  Most of my ProSeries returns are multi-state so I also want to avoid the "OSC" domino effect.

Rick