Yacc mystery errors

[covey at uiucdcs.Uiuc.ARPA]

Can anyone out there help me with a problem I have been having with the Yacc
utility?

The problem is this:
	
	I have been using Yacc to try to build a parser for a new language.
	In the y.output produced I get several "shift-reduce" and 
	"reduce-reduce" conflicts.  That's ok because I know how to deal
	with most of them.  

	However, I also get many "Rule not Reduced" errors and I haven't
	the vaguest idea what these are caused by or how to correct them.
	I haven't been able to find any documentation on this error anywhere.

Has anyone else encountered this problem?  If so does anybody know how to get
rid of these errors.  If there is any documentation on the subject I would
love to know about it.  

Thanks for your help.  You can either reply here in the notes files or send
me mail at the addresses listed below.

				Nancy Elizabeth Covey
				University of Illinois at Urbana-Champaign



covey at uiuc.ARPA		(via ARPAnet)
covey at uiuc.csnet	(via CSNET)
ihnp4!uiucdcs!covey or
pur-ee!uiucdcs!covey	(via USENET)

Or you can send mail the old fashioned way (I know--perish the thought!) to

		Nancy Covey
		1211 W. Church apt.1
		Champaign, ILL 61820

Guten Tag!