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From: Robert Morris 
Date: Thu, 7-Feb-85 19:29:15 EST
Article-I.D.: brl-tgr.8119
Posted: Thu Feb  7 19:29:15 1985
Date-Received: Mon, 11-Feb-85 03:59:56 EST
Sender: news@brl-tgr.ARPA
Organization: Ballistic Research Lab
Lines: 7

Yes, the Apple implentation of PostScript, and perhaps other
implementations, pass back error messages from the
host at least on the serial line. They are only slightly more
informative than those from most C compilers (ratifying Reid's
recent linguistic analogies) but certainly are helpful if
you know what you are trying to accomplish but don't know
why it isn't working.