ERROR: The PUT function referenced in the %SYSFUNC or %QSYSFUNC macro function is not found.

[StickyRoll]

Below is my script

%let rpt_date="30Nov2021"d;
%let rpt_date2=%sysfunc(put(&rpt_date.,yymmddn8.));
%put rpt_date2 is &rpt_date2.;

data b;
seattle=put(&rpt_date.,yymmddn8.)
;
run;

What I want to achieve is to convert the function in Dataset b it into a macro variable (rpt_date2) that shows character value in YYYYMMDD. However, I am getting the following error.

 ERROR: The PUT function referenced in the %SYSFUNC or %QSYSFUNC macro function is not found.

What could possible be wrong when converting the function that works in a datastep into a macro variable?

[data_null__]

You must use the datatype specific version of the PUT function PUTC/PUTN with %SYSFUNC.  See documentation for others.

34         %let rpt_date="30Nov2021"d;
35         %let rpt_date2=%sysfunc(putn(&rpt_date.,yymmddn8.));
36         %put NOTE: &=rpt_date2;
NOTE: RPT_DATE2=20211130