Bug117.dfy(28,7): Error: AM1 in ConcreteModule2 must be imported with "opened"  to match the corresponding import in its refinement base AbstractModule2.
Bug117.dfy[ConcreteModule2](13,42): Error: Undeclared top-level type or type parameter: AbstractType1 (did you forget to qualify a name or declare a module import 'opened?')
Bug117.dfy(33,7): Error: AM1 in ConcreteModule3 cannot be imported with "opened" because it does not match the corresponding import in the refinement base AbstractModule3 
3 resolution/type errors detected in Bug117.dfy
