Debug allowlists

The entries in an allowlist are processed individually, that way the allowlist will be applied to the Open Platform Communications (OPC) Server instance despite any invalid entry.

If an invalid entry appears in an allowlist, it will be skipped during processing. The failure to register this entry will be logged as an error message in the OPC Server log. The allowlist for any OPC Server instance should be edited when errors related to the allowlist appear in the OPC Server log.

The log contains information about the line number for all erroneous entries, in addition to the reason processing failed. Processing of an entry can fail for several reasons: the point does not exist, the table does not exist, improper formatting, and an invalid writable status.

The failure of all client attempts to read or write to a point will also be logged. If it is decided that the OPC Client should be able to access or write to any point for which errors are frequently being logged, the point can be added or modified in the allowlist for the OPC Server instance at any time.

Note: Any time the allowlist is changed, the OPC Server must be restarted for changes to take effect.