This diagnostic means that the server invoked the PostScript interpreter
to image a submitted PostScript document but the resultant document
file was invalid (TIFF is the file format used for imaged facsimile).
If the server machine is setup correctly this should never happen.
(Incorrect PostScript documents should be returned to the user with
a different diagnostic.)
The problem must be debugged on the server machine.
The following step-by-step procedure might be used:
to stop the fax server.
Submit the problematic job using the
program or similar.
Position yourself at the top of the server spooling area;
Invoke the PostScript interpreter script as done by the fax server:
bin/ps2fax -o t.tif docq/doc*.cover
and look for problems.
(Actually the above command line is a simplified version of the one
used by the fax server; you can find the exact command line
used by the fax server in the server trace log.)
From this you should see exactly why the PostScript interpreter
is not functioning as expected. Once
you've done that you can backtrack to figure out the step in the
installation procedure that was not done correctly. If step 4 generates
a valid TIFF file in
the output file t.tif, then there is some problem associated with
the environment the server runs in (e.g. the environment variable that
specifies where to search for dynamically loaded libraries).