Sage 50 US

Hi, I don't use Sage often so this may be a simple question. I have a client who is using Sage 50 2016 but I only have licenses for 2017 and 2018, is it possible for me to open the client file in 2017 or 2018 and still be able to send back journal entries…

I've poured through event logs prior to this occurring but not finding anything suspicious. We've tried restarting SmartPosting and Autoupdate service when it happens, no change. Other applications on this terminal server are working fine, but for some…