I sometimes get this error message when trying to download code to my 20m2 chips..."Firmware >= C3 'idle high' modes not supported by this firmware version". If I close PE6, and reopen it, I can then download the program to the same chip OK. Chip is (version 114C3Y). I've seen this with 2 different 20m2 chips over the past few months. Am running PE6 Version 6.0.8.11. Is this a known problem?? Anyone know what's happening?? Thank you JimS