Subject Re: [firebird-support] differences between firebird 2.5 cs and 3.0 rc2 ss
Author Ann Harrison
On Fri, Mar 4, 2016 at 3:22 AM, 'Checkmail' check_mail@... [firebird-support] <> wrote:


If I must go back tot he 2.5 version of firebird, how can I gbak the new backup-file to the old version?

If you haven't used V3 features in data definitions or the new authorization options, reverting is pretty easy.  Leave V3 installed for the backup.   Find a copy of gbak from a 2.5 distribution and use it to create a backup file.  Install Firebird 2.5.x and use the 2.5.x gbak to restore the database.  If you've used 3.0 features including the various authorization options, you'll probably need to extract the database metadata, edit out references to new features and create a new V2.5.x database in a separate environment.  You'll need to have both versions of Firebird available simultaneously.  Use one of the database migration tools to copy the data from thoe V3 database to the V 2.5  You can find migration tools here:

Good luck,