Robot brain not getting serial link to robot c

I have two brains that have randomly stopped connecting to robot C for compilation and download. I have downloaded the firmware multiple times, and removed the battery and cold booted it, nothing works. I have connected other brains to the PC and downloaded the identical program with no issues so i have isolated it to two bad robots. Has anyone else experience this? Have any ideas or fixes? See pic for error message.


Apparently it is an robot c update that was just pushed out. If you update robot C to the latest version it fixes it.