In a BS2000 environment the driver program is an ABAP program named RSDRIVER. In the following, it is referred to as the driver. The driver can only work in a running SAP online system. An external driver is not available.

You can start the driver in one of the following ways:

1. Automatically after the message queue has been created
2. Manually via the administrative transactions TMQD and TMQM
3. Manually by calling up the program in dialog
4. Remotely from another application (via a free CPI-C connection)

In cases 1 and 2 processing is asynchronous,while in cases 3 and 4 it is synchronous.

Asynchronous processing requires special prommamming, because distributed transaction processing within an asynchronous UTM transaction is possible only with UTM V3.3/UTM-D V2.0.

With earlier versions, distributed transaction processing can be simulated with asynchronous messages.

BS2000 R/2 Host: UTM-UTM Connection

You will find more information in the following topics: