If I reinstall the app it works again for a short while (few days) then starts to crash again. The system has been running fine for some months and then recently they started to get Fatal Exceptions not when launching the app but when they try and open a form within the app after log in. I have one client who's PC's are all Windows 10 and their installations are no different to anybody elses with a standard VFP9 runtime libraries, Windows Common Controls and a few other dependables for various features in the system. The app is quite a big SQL base client server compiled exe built in VFP9 SP2. Hi, I have over 300 users across the country using my app on all flavours of Windows without issue but this one has me flummoxed.
