Learn about error and informational messages

Message logs

The location of the message log depends upon the platform on which the interface is running. See the UniInt user guide for more information.

Messages are written to PI Message log at the following times.

• When the interface starts many informational messages are written to the log. These include the version of the interface, the version of UniInt, the command-line parameters used, and the number of points.

• As the interface retrieves points, messages are sent to the log if there are any problems with the configuration of the points.

• If the /db is used on the command line, then various informational messages are written to the log file.

System errors and PI errors

System errors are associated with positive error numbers.

Errors related to PI are associated with negative error numbers.

Error descriptions

On Windows, descriptions of system and PI errors can be obtained with the pidiag utility:

\PI\adm\pidiag /e error_number