PokerTracker

im getting this message

Unable to determine player that finished in position 982 in tournament number 79860958.

how do i fix this

Install the latest PATCH, version 2.17.01g from this link (MAKE SURE YOU DOWNLOAD THE PATCH INSTALL, the second link on this page, and NOT the full version:
http://www.pokertracker3.com/products/PTH/download.php

The error might still happen but it will at least allow the summary to save.