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From: eer36024@uxa.cso.uiuc.edu (Erik Reuter)
Newsgroups: comp.sys.mac.misc
Subject: Re: Help with Send PS
Message-ID: <1991Apr29.142035.5646@ux1.cso.uiuc.edu>
Date: 29 Apr 91 14:20:35 GMT
References: <1991Apr28.080441.23172@newshost.anu.edu.au>
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Organization: University of Illinois at Urbana
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I had this problem a while back, and here is the cause (as I understand it)
and the solution that has always worked for me.

There are two kinds of Postscript files you can create with your Mac, ones with 
LaserPrep (k) and ones without (f). See the file on Generating Postscript   
files, on sumex, for details. 
 
A Laserwriter, once it has been initialized with a certain version of LaserPrep 
(i.e., a document with a certain version of LaserPrep is printed), will work 
only with Postscript files which were created to work with the same version of 
LaserPrep as in the printer (whether or not the Postscript file has LaserPrep 
prepended). 
 
Thus, the Laserwriter probably has a different version of LaserPrep in memory  
than is on the Mac which created your Postscript file. 
 
The foolproof way to do it (and the way I usually do it) is to ALWAYS include 
LaserPrep in your Postscript file, and to ALWAYS reboot the Laserwriter before 
printing (either by cycling the power, or better, by using SendPS's menu 
command).