> Database Error: ResourceException:
> org.firebirdsql.jca.FBResourceException:
> local transaction active: can't begin another Reason: local
> transaction active: can't begin another
>
> What does it mean "local transaction"? Why one can block another to
> start?

For this case you can consider local transaction as a transaction
object associated with your connection. JDBC specification allows only
one transaction per connection. You cannot start new transaction for
your connection without ending current. Can you post your stack trace?
Do you have a test case that reproduces this issue?

Also I would recommend you to upgrade to driver version from the CVS,
there was one serious bug fixed after RC3.

Best regards,
Roman Rokytskyy