I'm trying to download and compile my code to our robot, i have the controllers connected to the computer, but when i hit f5 i get a message saying "Mismatch between robot controller type ('BAD') and platform setting on the PC ('VEX Cortex'). Configure the correct controller type and try again."

Anybody know what's going on?

There are a couple of things you will need to check to solve this problem. First, make sure your Platform Type (found under the Robot -> Platform Type menu option) is set to the correct type. Then, simply redownload the firmware by navigating to the 'Robot -> Download Firmware' menu option in ROBOTC. Once the firmware is downloaded properly the error message should go away.

Tried that, one controller needed the update, but the other one started having the joystick light flash yellow. i think that was the problem so i'm going to try using a partner controller instead of a programmable one.

And I'm still getting the same error message with the controllers.

Ok i fixed the error message, but now the controller has a solid red light above ROBOT, the JOYSTICK and VEXnet are flashing green

Do you have the backup battery plugged in? Typically, a red light on ROBOT means low batt.

We just plugged in a backup battery, the red light turned back into flashing yellow light, when i download and run the program only the partner controller works.

I don't know what I did... but it fixed itself haha thanks for your help!