A full data file is corrupt. Path: %1 Cause: The Address Book Server is attempting to read one of the full data files in ...

A full data file is corrupt.

Path: %1
Cause: The Address Book Server is attempting to read one of the full data files in order to generate a delta file. The full data file is corrupt and the delta file cannot be generated.
Resolution:
Examine the details in the associated event log entry to determine which full data file is corrupt and first save it away for possible use by PSS.  Then delete the corrupt file.  This will result in a missing delta file, but the client will get the next oldest delta file instead.