ID:284002 Cannot process state machine "<name>" using user-encoded method

CAUSE: You set the State Machine Processing logic option to User-Encoded; however, Analysis & Synthesis could not find unique user encoding in the design for the specified state machine.

ACTION: No action is required. Analysis & Synthesis automatically chooses the best encoding method for the state machine. If you want to use user-encoded state machine processing, add unique encoding to the design file containing the specified state machine.