The problem is that the PPD used to make this file on the Mac with
the LaserWriter 8 driver appears to be flawed because it does not
protect some of the "Feature" setup by putting it in a 'stopped'
context as is customary with PPD options. The offending section is:

%%BeginFeature: *JobPatchFile 0
    currentsystemparams/MaxImageBuffer get 4194304 lt{
    << /MaxImageBuffer 4194304 >> setsystemparams}if
    currentsystemparams/JobTimeout get 0 ne{
    << /JobTimeout 0 >> setsystemparams}if
    currentuserparams/MaxSuperScreen get 4194304 lt{
    << /MaxSuperScreen 4194304 >> setuserparams}if
%%EndFeature

This gets an error on Ghostscript since we don't have the system
param "MaxImageBuffer", thus throwing an 'undefined' error.

I recommend that we investigate Adobe implementations and add any
systemparams that are 'standard' in Adobe RIP products and distiller.