Critical Warning (16248): pin is placed too close with ADC pins.

Hi Rahul, Thanks again for following up. The link you posted is broken. For changing the signal name, I experienced a weird problem before where changing the signal name helped getting rid of errors, so I just tried this time too. Specifically, I changed the signal name from "SystemStopped" to "SystemStop", then assign the same pin K5 to it, received the incomplete IO warning, I added 2 lines to the qsf file, no incomplete IO warning, but ADC pin warning. Thanks