Go to 'Database > Database Management' and select 'Housekeeping > Revert PostgreSQL Tuning'. Next
restart PokerTracker 4 with logging enabled, try a full cache rebuild again and if it fails send us your PokerTracker4.log file in a
Support Ticket. You can access the 'Logs' folder with the log file by clicking 'File --> Open User Data Folder' in the main PokerTracker 4 window and the file we need is the text file called 'PokerTracker4' or 'PokerTracker4.log' that is in that folder. If the cache rebuild completes without errors then with logging enabled again try things out on the tables and send us your log file if you have any problem with your HUD/hand importing.