One of the functions of the PMDF CNBUILD utility is to compile PMDF configuration information into an image that can be loaded quickly.
The compiled format is quite rigidly defined and often changes substantially between different versions of PMDF. Minor changes can also occur as part of mid-version releases.
When such changes occur, an internal version field is also changed so that incompatible formats can be detected. When an incompatible format is detected, PMDF components will halt with a "Compiled configuration version mismatch" error.
The solution to this problem is simply to generate a new compiled configuration with the OpenVMS commands,
$ PMDF CNBUILD/OPTION $ INSTALL REPLACE PMDF_CONFIG_DATA
It is also a good idea to use the PMDF RESTART command to restart any resident PMDF server processes so they can obtain updated configuration information.