Date:         Thu, 10 Jun 2004 08:52:59 -0400
Reply-To:     "Richard A. DeVenezia" <radevenz@IX.NETCOM.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Richard A. DeVenezia" <radevenz@IX.NETCOM.COM>
Subject:      Re: Can a macro variable be unassigned in version 6.12

Mark S Goldberg wrote:
> I've seen a few places that state explicitly that a macro variable
> CANNOT be unassigned (that is until the version 8.2 "call symdel"
> command was implemented). I, however, remain of fervent hope that
> someone knows someway to accomplish this.
>
> I'm looking to validate a series of macros and, among other things,
> to test how they respond to missing expected macro variable
> assignments. The easiest way to do this would be to leave the whole
> infrastrucure of the system in place and just have individual
> programs unassign a particular variable and then call the macro.
>
> Thanks for your help!
>
> Mark
> Forest Research Institute
> Jersey City, NJ

Not in any supported way.
Your best bet is probably to setup a bunch of unit tests in individual
program files and run each one in batch.

The unsupported way involved changing the number of catalogs cached and
deleting some files via an x command.  The archives should contain at least
thread describing the process.

--
Richard A. DeVenezia
http://www.devenezia.com/downloads/sas/samples