Odd Error Message

[Judy Perry]

Hi,

This same error message comes up rather alot:

     	executing at 8:28:53 PM
Type	selectedChunk: error in button or field expression
Object	Mouse Messages
Line	put the selectedText of me into theChoice -- allows Rev to
determine which item has been selected.
Hint	stack "Mouse Messages" of stack
"/Users/judy/Documents/MSIDT_Final/FinalProjectGraphics/RevTour.rev"

(a) Does something look extremely wrong with the offending line?
(b) Why is this coming up on a completely different card in which this
script does not reside?  (it comes up on various cards at various times).

Am I losing my mind?

Judy