[comp.sys.mac] What is Error ID=12 ?

ivan@metasoft.UUCP (Ivan Hajadi) (10/24/89)

	I just got SE30 and some combination of inits, software,
debuggers keep giving me System Error ID=12, then I have to reboot the
system. 

Can anyone email me what causes this and what ID=12 means ?
Thank you much.

Software that gives me this problem:
FastBack with Apple macro installed.
TMON.
MacsBug gives me only half the screen w/ bigger characters (this is
the most confusing one for me)
-- 
  Ivan Madya Hajadi								Off: 617-576-6920	
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