Hello, I'm just getting into Pharo, and am trying to
do the example 'tutorial' UI programs in chapter 2 of The Spec UI Framework book. I have�� a special interest in end user GUI interfaces for programs. I enter the first example code as written and the methods are all accepted without errors. And yes, I did generate the accessors.

However , on attempting to execute the code at the bottom of page 6 from the latest Spec UI Framework book,


| ui |

ui := CustomerSatisfaction newopenWithSpec.

ui close.



this error message appears, no UI image appears of course.

"SubclassResponsibility:CustomerSatisfaction class had the subclass responsibility to implement #defaultSpec"

======

Not only don't I understand the message, but it implies I have to write something called #defaultSpec !, which is not mentioned in the tutorial.


Any help appreciated,

Yours,

--
Cheers,
Brett