From mboxrd@z Thu Jan  1 00:00:00 1970
To: brojohnson@home.com
Cc: 9fans@cse.psu.edu
From: erik quanstrom <quanstro@speakeasy.net>
Subject: [9fans] Standalone authentication server
Message-Id: <20010530134928.BAE123EA0A@quanstro.net>
Date: Wed, 30 May 2001 09:49:28 -0400
Topicbox-Message-UUID: aa87c752-eac9-11e9-9e20-41e7f4b1d025

without looking at the script you are running, 
"rc: null list in concatenation" means that you 
are glomming something onto a null list (probablly
and undefined variable). for example

; echo ()^x
rc: null list in concatenation
; echo $bar^x
rc: null list in concatenation
; echo x$bar	# free caret
rc: null list in concatenation

interestingly, byron's rc allows null-list concatination

; echo ()^fu
fu

erik