PI message definition file

The message definition file stores information about the messages. This database associates a message ID with each message, along with the message text, parameters, severity, and other information. The message definition file is called pimdf.dat and it is stored in the PI\dat directory.

Every product installation may update the definition with new messages. If the message definition file is not present, or is an old version, then some messages may not be able to be rendered into readable text. In this case the message will read something like:

E 29-Jul-08 17:44:17 pibasess (8020)
>> Unknown Message # 8020

To see what version of the message definition file is installed, type:

pidiag -mdfv