InterForm400 Usage Statistics
To view your InterForm400 usage statistics, you have two methods:
APF3812/APFMENU
Opt 12. Service functions
Opt 10. Display resource statistics
Find the *OVERLAY entries using Opt 5 to drill down, each overlay has a last used date.
Secondly, this information is stored in file APF3812/USESTAP which you can use in Query or SQL.