Debian 9 Image Magick/display xwd(1) format

[conover@rahul.net (John Conover)]

xwd > myfile
display myfile

gives:
 
    "display-im6.q16: no decode delegate for this image format `' @
    error/constitute.c/ReadImage/504."

Anything else read the file and do file conversions?

    Thanks,

    John

-- 

John Conover, conover@rahul.net, http://www.johncon.com/