ID:15733 Ignored Virtual Pin logic option on PLL external feedback input pin "<name>" -- logic option is illegal for PLL external feedback input pins

CAUSE: You assigned the PLL external feedback input pin. However, this logic option assignment is illegal for PLL external feedback input pins. When this condition occurs, Analysis & Synthesis ignores the Virtual Pin assignment for the pin.

ACTION: No action is required. However, to avoid receiving this message in the future, remove the Virtual Pin assignment from the pin.