topic Re: Macro calling Warning in SAS Programming

Macro calling Warning

abhinayingole — Thu, 20 Jan 2022 18:06:18 GMT

%macro p;
  %let _1p = 184;
%mend p;

%p;

%put RESULT = &_1p.;

I am getting warning for above code as...

WARNING: Apparent symbolic reference _1P not resolved.

can anyone please help

Re: Macro calling Warning

AMSAS — Thu, 20 Jan 2022 18:14:31 GMT

Yes, because your _1p macro variable is local to the p macro

Scope of macro variables

%macro p;
  %global _1p ;
  %let _1p = 184;
%mend p;

%p;

%put RESULT = &_1p.;

Re: Macro calling Warning

abhinayingole — Thu, 20 Jan 2022 18:13:59 GMT

I need to use _1p after the macro p ends.
any suggestion

Re: Macro calling Warning

Tom — Thu, 20 Jan 2022 18:27:51 GMT

If you want _1P to be available after the P macro finishes running the make sure it is NOT local to P.

%let _1p=BEFORE;
%p;
%put &=_1p;

You could modify the macro to force it to be GLOBAL if is doesn't already exist.

%macro p;
%if not %symexist(_1p) %then %global _1p;
%let _1p=from macro p;
%mend p;

Terminology correction: You macro call worked fine. It was the macro variable you tried to reference after the macro had finished running that was generating the warning.