Date:         Thu, 1 Apr 2010 14:14:36 -0400
Reply-To:     "Keintz, H. Mark" <mkeintz@WHARTON.UPENN.EDU>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Keintz, H. Mark" <mkeintz@WHARTON.UPENN.EDU>
Subject:      Re: What is the option in Macro to display ERROR message if macro
              variable is not Resolved
Comments: To: Amar Mundankar <amarmundankar@GMAIL.COM>
In-Reply-To:  <15c66926-a8b6-4767-9d7c-d0ec913b085c@u31g2000yqb.googlegroups.com>
Content-Type: text/plain; charset="us-ascii"

Amar:

SAS macro does not issue an error (but only a warning) because it is NOT neccesariliy an error.

In the warning message you report, the key word is APPARENT.  You may actually want to %put the literal value &LAST.  SAS macro can't know for sure.

Yes, there are quoting mechanisms that might avoid the warning, but I wonder if the only quoting mechanisms that would avoid the warning might also prevent sas macro from resolving &&&&&last to &last to begin with.

Regards,
Mark


> -----Original Message-----
> From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of
> Amar Mundankar
> Sent: Thursday, April 01, 2010 1:10 AM
> To: SAS-L@LISTSERV.UGA.EDU
> Subject: Re: What is the option in Macro to display ERROR message if
> macro variable is not Resolved
>
> On Mar 29, 9:40 am, Amar Mundankar <amarmundan...@gmail.com> wrote:
> > Hi all,
> > The code is :
> >
> > options sgen;
> > %let one = two;
> > %let two = three;
> > %let three = four;
> > %let four = last;
> > %put &&&&&last;
> >
> > Output is :
> >
> > 357   %put &&&&&last;
> > SYMBOLGEN:  && resolves to &.
> > SYMBOLGEN:  && resolves to &.
> > SYMBOLGEN:  && resolves to &.
> > SYMBOLGEN:  && resolves to &.
> > WARNING: Apparent symbolic reference LAST not resolved.
> > &last
> >
> > Now i want, if SAS doesn't find the Macro variable  "last" then
> > instead of WARNING:, it should display ERROR: message and it should
> > not print the output as "&last" .
> > Is there any way that sas will not output "&last' in the log ??
> > Please help.
> > Thanks in Advance.
> >
> > Thanks and Regards,
> > Amar Mundankar.
>
> Hi all,
> Does anybody have any idea about the above mentioned question?
> Is it possible in SAS or not???
> Please help.
>
> Regards,
> Amar Mundankar.