For More Information - Compaq TCP/IP Services for OpenVMS Programming And Reference Manual

If you have problems running images linked against an older version of
UCX$ESNMP_SHR.EXE, verify that the version in SYS$SHARE is the
latest by entering the following DCL command:
$ DIRECTORY/DATE SYS$SHARE:*$ESNMP_SHR.EXE
The creation dates of the files with the prefix TCPIP$ and UCX$ should
be within a few seconds of each other, and only one version of each file
should exist. Make sure both images include the file protection W:RE.
– You should relink and perhaps recompile images associated with ECOs for
Version 4.1 or 4.2 other than those discussed in the previous list item.
Images linked against object library (.OLB) files may not need to be relinked,
although you can relink them against the shareable images in this version of the
product to decrease the image size. Relinking against the shareable image allows
you to take advantage of updated versions of the eSNMP API without the need to
relink. Some images linked against the current version of TCP/IP Services may
run under Versions 4.1 and 4.2, but this backward compatibility is not supported
and may not work in future versions of TCP/IP Services.
If an existing subagent does not execute properly, relink it against this version
of TCP/IP Services to produce a working image. Some subagents (such as the
OpenVMS Server MIB) require a minimum version of OpenVMS as well as a
minimum version of TCP/IP Services.

1.8 For More Information

This manual provides the OpenVMS information required for implementing
eSNMP subagents and ensuring their proper operation in that environment.
The eSNMP software for OpenVMS is derived from the Compaq Tru64 UNIX
product. For information about the architecture and for details about the eSNMP
API, refer to the UNIX documentation at the following URL:
http://www.compaq.com/unix
For information about prototypes and definitions for the routines in the eSNMP
API, see the TCPIP$SNMP:ESNMP.H file. Table 1–2 lists files that contain
additional comments and documentation.
Overview
1.7 SNMP Versions
Overview 1–9