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window-hardcopy for fred dialog items

On page 493 in the manual for MCL 2.0 final, it says that window-hardcopy
works for Fred windows or Fred dialog items.  However, when I create a
window with a scrolling-fred-dialog-item (which I assign to a variable x)
and then call
  (window-hardcopy x)
I get an error message:  "No applicable method for args:
(#<ccl::scrolling-fred-dialog-item #x51E179>) to
#<standard-generic-function window-hardcopy #x47A396>."

Am I doing something wrong?

Dale J. Skrien   	       	       	       	       	djskrien@colby.edu
Dept. of Mathematics & Computer Science 	       	207-872-3256
Colby College, Waterville  ME  04901