> "C:\Program Files\Firebird\Firebird_1_5\bin\gbak.exe" -c -p 4096 -se -v
> localhost:service_mgr I:\Firebird\s6.fbk localhost:I:\Firebird\s6.fdb 500000
> localhost:I:\Firebird\s6A.fdb 500000 localhost:I:\Firebird\s6B.fdb -user xxx
> -password yyy

The switch
-se
expects value
localhost:service_mgr
i.e. put "-v" elsewhere.

Ivan