Driver Error Messages

The following is a list of error messages the driver might return:

• USN Cache Initialized from disk

  This is an informational message printed at the beginning of the driver initialization indicating that the driver's last state was read from the disk.

• USN Cache could not be initialized. Most likely reason: Insufficient memory.

  The previous driver state was not initialized correctly. This means that the registry or the driver configuration file was manipulated by another process. This might happen if you accidentally deleted one of the driver configuration files. This results in a loss of event data.

• DAPIStart() failed. Please check the Event Log for details. Returned error code =

  This usually suggests that the Exchange Server is down or could not be reached. The NT Application Event Log should contain a more detailed description of the error.

• DAPIStart() encountered non fatal error. Please check the Event Log for details. Returned error code =

  This error message is returned when a warning was returned by Exchange.  The returned warning is logged in the NT Application Event Log.

• Call to Import function failed. Likely cause- bad XML or too little memory.
• Subscriber Import attempt failed. Please check the NT Event Log for details. Returned error code =

  An attempt to write to the Event log did not succeed.

• Subscriber Import attempt encountered non critical error. Please check the NT Event Log for details. Returned error code =
• A bad XML document was sent to the driver. Critical error in the Subscriber XML document.
• A bad XML document was sent to the driver. The subscriber could not process the input node.
• A bad XML document was sent to the driver. An unsupported operation type was received.
• A bad XML document was sent to the driver. The operation node could not be processed.
• Bad Subscriber filter or Subscriber filter contains an unsupported attribute. Please check the Subscriber filter.

  An unsupported attribute was added to the Subscriber filter. Verify the Subscriber filter with the list of supported attributes in the file ATTRIBUTES.TXT (located in the NT\DIRXML\DRIVERS\EXCHANGE\RULES directory).

• Could not log in to Exchange with the specified credentials. Driver will not start.

  The authentication credentials supplied were incorrect.  The credentials specified should be for an NT account/domain that has rights to the Exchange directory.

• NT Event handles could not be created. The System could be low on memory
• An expected initialization parameter was missing from the parameter list.

  One or more of the initialization parameters was missing.  Try restarting. If the problem persists, try retyping the initialization parameters.

• Could not allocate memory.
• Failed to initialize the base of the USN cache. Driver will not start.