Where are you seeing the 4.0 SP2? are you looking at transaction SPAM? the product version report? 4.0 SP2 was originally released in 2012. We typically do not have new customers on SP2 any longer, but we do have confusion with the version because of when support was added for BASIS 740. The product version report will provide the necessary information. /fldq/rsprodver
If you do not have a populated match code table, duplicates will not be found against records that exist in your system. they will only be found in records that have been modified and match codes created.
If you create match codes without running the quarterly reports, as Nestor mentions, your results can be poorer because the codes could be different.
Thanks,
Virginia