> autotrace
[background-color=FFFFFF--input-format=BMP--output-file=C:\--output-format=hpgl]
<r.bmp>

`[', `]' and '<' and `>' are special characters.

Do like:

autotrace --background-color=FFFFFF --input-format=BMP
--output-file=C:\\foo.hpgl --output-format=hpgl

or

autotrace --background-color=FFFFFF --input-format=BMP --output-format=hpgl >
C:\\foo.hpgl

I'm not using DOS or Windows. So I'm afraid `C:\\foo.hpgl' is wrong. If you get
an error with
above command line, use C:\foo.hpgl instead.

Masatake YAMATO