[AUCTeX] preview-buffer not working on OS X? (PDF2DSC sentinel: Wrong type argument: arrayp, nil)

[Hong Xu]

Hi all,

I got the following message when I run `C-c C-p C-b`:

Output written on _region_.pdf (114 pages, 184035 bytes).
Transcript written on _region_.log.

TeX Output exited as expected with code 1 at Tue Dec  9 00:10:58
Running `Preview-PDF2DSC' with ``pdf2dsc _region_.pdf
_region_.prv/tmp30254S6q/preview.dsc''

Preview-PDF2DSC finished at Tue Dec  9 00:10:58
PDF2DSC sentinel: Wrong type argument: arrayp, nil


M-x list-processes would give

Preview-Ghostscript run     *buffer/name --      
-dOutputFile=(_region_.prv/tmp30254S6q/pr1-%d.png) -q -dNOPAUSE -DNOPLATFONTS 
-dPrinted -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sDEVICE=png16m 
-r110.557x110.613

Seems Preview-Ghostscript does not find rungs or gs, which I have installed. 
Don't know if this is a
bug.

Thanks!
Hong

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