mro:c3:

Inconsistent hierarchy during C3 merge of class 'SW':
  current merge results [
    SW,
  ]
  merging failed on 'D' at src line.
  main::BEGIN() called at src line
  eval {...} called at src line
BEGIN failed--compilation aborted at src line.
Inconsistent hierarchy during C3 merge of class 'SW':
  current merge results [
    SW,
  ]
  merging failed on 'D' at src line during global destruction.



mro:default:

main::ISA=["CP", "SW", "D"]
Can't locate object method "cp_new" via package "D" at src line.
 at src line.