ID:186378 Node "<name>" must be placed at sublocation 0 (Fitter tried to place it at location <name>)

CAUSE: You made location assignments for nodes in the carry chain that starts with the specified node that caused the Fitter to place the specified node at a sublocation other than 0. Because the node uses its invert A input port, it must be placed at sublocation 0.

ACTION: Delete some of the location assignments for nodes in the carry chain.