Hello, I want to load csv files into sas and append them , but the issue is that the number of files is not fixe ( it’s could be 2, 3 …). So to load them I’m using this macro :   %macro drive(dir,ext);    %local cnt filrf rc did memcnt name;    %let cnt=0;             %let filrf=mydir;       %let rc=%sysfunc(filename(filrf,&dir));    %let did=%sysfunc(dopen(&filrf));     %if &did ne 0 %then %do;      %let memcnt=%sysfunc(dnum(&did));        %do i=1 %to &memcnt;                                        %let name=%qscan(%qsysfunc(dread(&did,&i)),-1,.);                                               %if %qupcase(%qsysfunc(dread(&did,&i))) ne %qupcase(&name) %then %do;        %if %superq(ext) = %superq(name) %then %do;                                   %let cnt=%eval(&cnt+1);                 %put %qsysfunc(dread(&did,&i));            proc import datafile="&dir\%qsysfunc(dread(&did,&i))" out=casuser.tbl_&cnt            dbms=csv replace;                      run;                 %end;       %end;        %end;       %end;   %else %put &dir cannot be open.;   %let rc=%sysfunc(dclose(&did));                    %mend drive;   %drive(c:\fldr,csv)   But I don’t know where I  should add the append in this code Any help please ? Thank you ... View more