Firebird 4.0 Release Notes
Thank you for choosing Firebird 4.0. We cordially invite you to test it hard against your expectations and engage with us in identifying and fixing any bugs you might encounter.
ODS 13 is introduced and it’s a major ODS upgrade, so older databases cannot be opened with a Firebird 4 server. The engine library is named engine13.dll (Windows) and libEngine13.so (POSIX). The security database is named security4.fdb. Binaries layout and configuration are unchanged from Firebird 3.
That said, you can copy the Firebird engine library from the Firebird 3.0 distribution package (named engine12.dll (Windows) and libEngine12.so (POSIX), and located inside the /plugins sub-directory) to continue working with databases in ODS12 without needing a backup/restore. However, new features introduced with Firebird 4.0 will not be accessible.
If you think you have discovered a new bug in this release, please make a point of reading the instructions for bug reporting in the article How to Report Bugs Effectively, at the Firebird Project website.
