C:\>thumbpdf test
THUMBPDF 3.15, 2012/04/18 - Copyright (c) 1999-2012 by Heiko Oberdiek.
*** make png files / run Ghostscript ***
!!! Warning: MediaBox not found, using default resolution: 9 DPI
Processing pages 1 through 2.
[1] [2]
*** make `thumbpdf.pdf' / run pdfTeX ***
*** parse `thumbpdf.pdf' ***
*** write `test.tpt' (pdfTeX thumbnail data) ***
*** clear temp files ***
*** ready. ***