It is my First question in this group.

I would like to know if someone has accomplished a migration from

Interbase 7.5 to Firebird 2.5.4 

I did it years ago.

1. Extract metadata from Interbase

2. Create the database in firebird with the metadata extracted. You may have to correct the source metadata, because the creation process will raise errors.

3. Once created firebird database, I used ibpump, free tool, to pump data from Interbase to firebird.

4. Test your application.

Jesús.