Recently, I met the same problem, here is my solution:
%macro correct_sas_name(name);
%let flag=%sysfunc(notname(&name));
%do %until(&flag=0);
%let char=%substr(&name,&flag,1);
%let name=%sysfunc(TRANWRD(&name,&char,_));
%let flag=%sysfunc(notname(&name));
%end;
h_&name
%mend;
%let test=SAS#123!34;
%let correct_name=%correct_sas_name(&test);
%put &test;
%put &correct_name;
The LOG:
Have a look at the function nliteral : Converts a character string that you specify to a SAS name literal.
This is good way, thanks.
But, normally this way is not that common.
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