Using STS 2.7.1 and following the wedding tutorial.

After you run the script supplied in the roo samples, you are then told the follow from 'final steps' in the blog. But edditing PublicRsvpController.java as instructed

adds the NEW line
@SessionAttributes("rsvp")
which produces tons of errors, the key one saying -

Multiple markers at this line
- The attribute value is undefined for the annotation type SessionAttributes
- SessionAttributes cannot be resolved to a type