@DayaG
Add MISSOVER or TRUNCOVER to your 2nd Infile statement.
Code like below should do the job for you:
data one;
infile datalines;
input file2read $40.;
infile dummy filevar=file2read end=done truncover;
do while(not done);
input var1 $ var2 $ var3 $;
if not missing(_infile_) then output;
end;
datalines;
D:\sas\Practice_ds\ae.txt
D:\sas\source\DLM\ae_new.txt
;
run;
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