DXK adiff import - dont allow import of dupes?


i have an adiff file that I am importing periodically, and that ADIF file is being appended to as i work new stations etc... 

while i found the means to eliminate dupes in the log and delete them after adiff import, is there some way kick them out and to not allow dupes to be imported in the first place? 

without of course editing the adif file etc... let the tools do the work... dont want to get into discussion of all the other options etc (like "why do i need to do that, when u can just blah blah blah" etc)... just looking for a specific answer to the above question.

-bob w9zv

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