In firebird 4.0, I configure firebird.conf to support both engine12 and engine13 plugins:
Providers = Remote,Engine13,Engine12,Loopback
The firebird service may access both Firebird 3.0 and 4.0 database.
Next, I try to nbackup a Firebird 4.0 employee database and it works:
fbsvcmgr service_mgr action_nbak dbname c:\4.0\employee.fdb nbk_file r:\fb40.nb0 nbk_level 0
Finally, I try to use nbackup a Firebird 3.0 employee database:
fbsvcmgr service_mgr action_nbak dbname c:\3.0\employee.fdb nbk_file r:\fb30.nb0 nbk_level 0
and it fail with message:
unsupported on-disk structure for file c:\3.0\employee.fdb; found 12.0, support 13.0
In firebird 4.0, I configure
firebird.confto support bothengine12andengine13plugins:The firebird service may access both Firebird 3.0 and 4.0 database.
Next, I try to nbackup a Firebird 4.0 employee database and it works:
Finally, I try to use nbackup a Firebird 3.0 employee database:
and it fail with message: