Technical data

5
System Management Release Notes
This chapter contains information that applies to system maintenance and
management, performance management, and networking.
For information about new features included in this version of the software, refer
to the OpenVMS Version 7.3 New Features and Documentation Overview.
V7.3
This note pertains to ACMS users, possibly Rdb users, and anyone else running
a user-written application that calls DECdtm to participate in a distributed
transaction with a remote system having these characteristics:
• The network connection is Compaq DECnet-Plus for OpenVMS over TCP/IP.
• The nodes are connected using only an IP router.
Users may see the following error, which is returned by DECnet:
IPC-E-BCKTRNSFAIL, failure on the back translate address request
This error is displayed upon a logical connection failure when the remote node
name cannot be translated by DECnet-Plus. The error can be triggered when
the DECnet-Plus node name for the remote system is not defined in the local
DECnet-Plus database and is defined only as ALIAS in the TCP/IP name server
for the remote node. For example, node XXYZZY may be defined as follows:
20.43.136.54 XXYZZY.ABC.DEF.COM, XXYZZY
To avoid this situation, either define the node name in the local DECnet-Plus
database or define the logical SYS$DECDTM_NODE_NAME to be equivalent to
one of the following:
• The value of the SYSGEN parameter SCSNODE
• The DECnet-Plus simple name
• The TCP/IP alias (that is, a six-character node name string such as XXYZZY,
as shown in the preceding example)
For other requirements and restrictions, refer to the section about managing
DECdtm Services in the OpenVMS System Manager’s Manual.
System Management Release Notes 5–1