PokerTracker

This is the second time this has happened. No matter which player I click on I get no data on the right hand side. It was working earlier in this session but it stopped. The previous time I did this I restarted PT3 and it fixed the problem. However, I don't want to have to do this on a continuous basis.

It could be caused by a filter - click Clear and see if the data appears.
It could also be an out of date cache - does it say 100% for all sections in the status bar at the bottom of PT3? If not, run Database > Housekeeping with the default options.

What version of PT3 are you using?
If it isn't one of the versions on the download page please update:

Download page
PT3 Build History / Release Notes