ID:176277 Can't pack register node "<name>" into I/O pin "<name>". The node "<name>" is used as a register for a MLAB cell.

CAUSE: The specified register node must be used by an MLAB cell and can therefore not be packed with the specified I/O pin.

ACTION: In the Assignment Editor, remove the Fast Input Register, Fast Output Register or Fast Output Enable register assignment applied to the node or I/O pin.