I’ve been using a Pololu USB AVR programmer successfully for months. But I’ve run into trouble after programming a 328p to run as SPI master. Now when I try to re-program it, AVR returns an ISP mode error and suggests to check connections and ISP programming frequency, both of which I’ve tried. The same setup works fine with other 328p chips. I’ve tried grounding the reset pin. I’m guessing there is some sort of interference as the ICSP and SPI are using the same pins, but I thought this would be NA when in programming mode. All other connections to the chip and SPI lines have be removed. Any work arounds or ideas?