Programmin the EPCS64 in the DE0-nano

Thanks for the thought, Dave. Yes I do have the Spansion device and not the Altera EPCS64, but the manual for the board does not state that I need to do disable that check. Nevertheless, I did as you suggested and it still does not program. The device doesn't even erase as the blank check fails, as does a verify if I select that (unchecking the blank check). In looking around more, the problem may be due to a protection bit being on in the device thereby preventing erasure and reprogramming....