We are having D5 database application which we recently moved over to D2007.

We are having D5 database application which we recently moved over to D2007. We were having a number of very strange issues in production with D5 version, AVs of all kinds, which never happen during development and testing - we hoped that moving to D2007 will eliminate at least some of them. But it turns out it has only added new ones. The application runs in either WIndows Server 2008 or 2012 terminal session, or Windows 8, or Windows 10.

Is it possible that these issues are due to 32-bit compiler while in fact we are running the app in x64 OSes?

Any suggestions on how to make the app more stable?

Thank you.