I was putting the code of the Follow-up Scheduler into the Program Editor and setting up the indenting and I noticed several things that are directly contrary to the programming practices advocated in the Programming Guide.  The deprecated Q&A command CNEXT is used in several places and Goto is used once.

It also has and undefined @Tn function.  (Page 496, just  above "By placing ...")

Also, the Else If ... could probably be simply replaced with a While <> loop.

It probably would be better to set it up as a function or subroutine where you pass it the source field and the field to move to when done (assuming the choices will always be the same).