Date:         Mon, 14 Jul 1997 15:53:26 +0100
Reply-To:     DRUYTSP <druytsp@OIOV59.MRGATE.VESTA.UMC.AKZONOBEL.NL>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         DRUYTSP <druytsp@OIOV59.MRGATE.VESTA.UMC.AKZONOBEL.NL>
Subject:      Re: Testing Existence of a Macro Variable

Keith,
 
Look into the SAS Guide to Macro Processing, Version 6, Second Edition.
 
On page 254 you will find the code of a macro that checks whether a macro
variable is defined.
 
Patrick Druijts
Statistical Programmer
NV Organon
The Netherlands