Official support for Windows 11 starts with much newer versions, such as Oracle Database 19c Forms 12c/14c Performance Issues:
Oracle Forms and Reports 6i is a legacy development suite that has been obsolete for over two decades. Officially, it is incompatible with modern operating systems like Windows 11. However, many organizations still rely on mission-critical applications built on this architecture, creating a demand for running this legacy software on modern hardware. oracle forms and reports 6i installation on windows 11
