This program demonstrates the concept of Futility of Debugging of call execute DATA _null_; do i = 1 to 3;    call execute(catt('%let i =',i,';%put note: i:&i;'));    end; stop; run; %macro put_i(data=); data _null_; putlog "mvar i: &i from data"; stop; run; %put note: &sysmacroname: i:&i; %mend; DATA _null_; do i = 1 to 3;    call execute(catt('%let i =',i,';%put_i'));    end; stop; run; DATA _null_; file 'subroutine.sas'; put '%put note: i:&i. from subroutine;'; stop; run; DATA _null_; do i = 1 to 3;    call execute(catt('%let i =',i                      ,';%include "subroutine.sas";'                      ,'%put note: i:&i in loop;'));    end; stop; run; *NOTE: test of global mvar J This is what I mean by complexity: a macro with either of percent+do or percent+if; %let _global_j = 0; %macro put_mvar(mvar=,note=none); %if not &_global_j %then %put note: &sysmacroname: mvar:&mvar,  note=&note; %else %put note: &sysmacroname: nothing to report, note=&note; %mend; %let _global_j = 0; DATA _null_; do i = 1 to 3;    call execute(catt('%put_mvar(mvar=',i,')'));    call execute(catt('%nrstr(%put_mvar(mvar=',i,',note=nrstr))'));    end; stop; %let _global_j = 1; %put note: _global_j = &_global_j; run; %put note: _global_j = &_global_j; Ron Fehd  macro maven ... View more