Our school has several VEX EDR Cortex kits that we have been using for about 4 years. We have built and operated the bots using the joystick controllers without issue. We have moved into programming basic movements and running into a problem with several bots. We have written and successfully downloaded programs and executed them. We have gone back to edit and/or download the default code and getting error codes. It will not download revised programs or install default code. Error messages relate to cannot find VEX system info. Batteries are good and connections solid. I have contacted VEX Tech Support, had some conversation for a few days, haven’t heard anything in 3 weeks.
Just a guess but because it says “cannot find VEX system info” I would try reinstalling the cortex firmware.
We tried that, it says it is up to date.