Problem with duplicate last line write

I'm new to screen-scraper and this forum, so apologies if I don't give enough info in this first post....

I took an example from the documentation and am trying to read in a .csv file of part numbers, scrape data on those parts, and write that back to a file.

I am getting everything to work except my output file has the last part number and associated info written twice. Any help would be much appreciated! I am posting the Initialization file. I am assuming the problem is here, but could obviously be wrong.

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import java.io.*;

session.setVariable("INPUT_FILE", "S:\\ScreenScraper\\partNumbers.csv");

BufferedReader buffer = new BufferedReader(new FileReader(session.getVariable("INPUT_FILE")));

while ( (line = buffer.readLine()) != null ){
session.setVariable("PartNumber", line);
session.log("***Beginning PN " + session.getVariable("PartNumber"));
session.scrapeFile("Seller");
session.scrapeFile("Item All Seller Info");
}

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