It would seem that the USAG online entry system has changed the way that it represents the ‘over n’ age groups. Rather than the previous “o12”, “o15” etc, it now has “12+”, “15+”.
The result is that when you try to import the list of athletes, TScore doesn’t recognise the age groups and reports loads of failures once it has exceeded the maximum 360 generated classes.
To get round this problem, you need to download an updates loopup file for age groups.
This file (LookupUSAAge.txt ) needs to replace the one you will find in your C:\Users\Public\Documents\TScoreX\ClassDefns\Lookup folder.
You can download the new file from here:
https://tscore.co.uk/Downloads/LookupUSAAge2018.zip