Problem with wide characters on upgrading to guile 2.x

[Richard Shann]

GNU/Denemo has a number of guile scripts in which wide characters are
embedded in strings. These used to work in guile 1.8 but with guile 2.0
I am seeing the following error message trying to use a string with "
"
in it (if that string will get through the email software)

(format #t "~%=> ~A~%""  ")
; the throw arguments are

(scm_to_stringn cannot convert wide string to output locale 84 #f #f)

what is "locale 84" and how can I return to the desired behavior?

Richard Shann