You are attempting to span multiple connections within a single transaction. You can switch to a different connection while a transaction is active if you use the WITH CONCURRENT TRANSACTION clause when you establish the connection.
This error message can occur when you try to switch connections as follows:
* If the current connection is to a Version 6.0 or later database server, you did not specify the WITH CONCURRENT TRANSACTION clause when you established the connection, and there is an active transaction in the current connection.
* If the current connection is to a Version 5.0 database server, you did not specify the WITH CONCURRENT TRANSACTION clause when you established the connection, and a database is currently open on this connection.