>
> perhaps
>
> jdbc:firebirdsql:localhost/3050:/D:\\databases\\test\\B2.gdb
>
> works
>

Ok, log looks better now:

jdbcUrl -> jdbc:firebirdsql:localhost/3050:/D:\databases\test\B2.gdb,


but still an error:

org.firebirdsql.jdbc.FBSQLException: Resource Exception. Unable to
complete network request to host "myhostname".
Failed to locate host machine.
Undefined service D/tcp.