I should have added that I replaced this line in the example... proc import datafile="&dir\%qsysfunc(dread(&did,&i))" out=dsn&cnt
dbms=csv replace; ...with the big block of import and de-dup code which I used to process one file at a time. So the "Example 1..." code no longer imports each file as its own data set but instead imports the file, does some proc sql work comparing, deduping, and union'ing it with my master table.
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