ID:18021 Primitive "<name>" of type <type> cannot feed CASCADE primitive "<name>" because the primitive already contains fan-out to one or more CASCADE primitives
CAUSE: The specified primitive cannot fan out to the specified
CASCADE
primitive because it fans out to one or more CASCADE
primitives.
ACTION: Modify the design so that the specified primitive fans out to only one CASCADE
primitive by removing all but one CASCADE
output from the specified primitive and deleting the remaining CASCADE
primitives.