1.Is On checked in Ghostscript in "Property Sheets->[Graphic]" ?

2. When Unknown special:... is displayed
Use a \special that is supported by dviout (cf. "Image data files").

3.When unable to openfoo.ps(PS) is displayed
The PostScript file that should be read is not found (be careful when setting -gdat:).

4.When a display appears like Ghostscript cannot be executed such as "Cannot execute gswin32(2)"
Check the -gsx: specification.

5.When Failed to makefoo.pbm ... or foo.bmp ... is displayed
Ghostscript has called to create a image data file but it cannot be created from a PostScript file.  The causes are 

 - An invalid library path for Ghostscript was set. (Refer to the Ghostscript manual and check the setting of environment variables.)
 - There were parameters that cannot be processed by Ghostscript or there were bad PostScript files (Many graphic software and Windows PostScript drivers output wrong EPSF files). 
 - A Ghostscript is used that does not support the output of raw PBM files (or BMP files) specified by -GIF: (Q_E4), or there was an error in a file write (be careful with the current directory or -gdat: settings).
 - in -gsx: specification of Ghostscript's path, space character can not be used.

For example, when "parameter file:" is tmp$.@@@ and the executable file is c:\gstools\gs5.10\gswin32c.exe, open the MS-DOS window, move to the directory containing the dvi files, and execute the following. The displayed messages may be useful in understanding the causes of errors.

c:\gstools\gs5.10\gswin32c @tmp$.@@@

5 Remark. If Display->Graphics in tool bar is not ckecked, the graphics will be ignored.