4100U reverse engineering effort: Panel crash - bad CFIG version, how to recover?

Ok, I will start looking

I recently ripped out a perfectly fine 4007es because the customer disliked jc. I was able to connect with 6.02.010 and I looked at all the hardware cc etc. I made a label change, rebuilt the job, then downloaded it back but now I get a master crash code 34. How do I recover? I used to do a lot of 4100u programming 10yearsago.

I get it today hopefully. Where are you located may I ask? I am near Dearborn Michigan.

Try downloading with usb instead of ethernet if thats what you are using

Sounds like them & you are my kind of people (at least if you dislike JCI too).

USB as in serial port ? Do you happen to know the pinouts ?