Export events even if part of the query generates an error (is not well formed). The service validates
the syntax of the XPath query to determine whether it is well formed. If the validation fails, the service
parses the XPath into individual expressions. It builds a new XPath beginning with the leftmost expression.
The service validates the expression and if it is valid, the service adds the next expression to the XPath.
The service repeats this process until it finds the expression that is failing. It then uses the valid
expressions as the XPath query (which means that you may not get the events that you expected). If no part of
the XPath is valid, the EvtExportLog call fails.