I'm also experiencing this. Trying to run " Blink" from examples. Running VISTA, UNO R3, MKII, com 4 (listing the hardware), verbose for compile from preferences, and re downloaded 3 times. Still same error message.
I'm also experiencing this. Trying to run " Blink" from examples. Running VISTA, UNO R3, MKII, com 4 (listing the hardware), verbose for compile from preferences, and re downloaded 3 times. Still same error message.