ID:21122 Output port <name>[<number>] of <name> atom "<name>" has illegal fan-out to input port <name>[<number>] of atom "<name>". The output port can drive only input port <name>[<number>] of atom "<name>".

CAUSE: The specified output port of the specified atom is connected to an invalid input port of the specified atom. The output port can drive only the specified input port.

ACTION: Either disconnect the output port of the specified atom or connect it to a valid input port.