[magick-users] "Unknown device: pam" when converting EPS

[Stevens, Ian]

I have an EPS file which, when I run the following command:
 
    convert -depth 8 -density 300 -colorspace CMYK -background white
-flatten +matte 5945.eps test.tiff
 
produces the following output
 
    Unknown device: pam
    Unrecoverable error: undefined in .uninstallpagedevice
    Operand stack:
        defaultdevice
    Unknown device: pam
    Unrecoverable error: undefined in .uninstallpagedevice
    Operand stack:
        defaultdevice
    convert: Postscript delegate failed `5945.eps': No such file or
directory.
    convert: missing an image filename `test.tiff'.
 
This is on a Debian box running Imagemagick 6.3.7 and Ghostscript 8.56.

 
Am I missing a package?
 
thanks,
Ian.