ID:21083 Ignored virtual pin assignment on DLL pin "<name>"

CAUSE: You assigned the Virtual Pin logic option to a pin that connects to a DLL port. However, this assignment is illegal for pins that connect to DLL ports. 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.