Strange Scheduled Agent Error

Ever had one of those days?   I have this scheduled agent, that is giving me very, very strange error messages.  It runs daily, at 1:00am, on a Lotus Domino 64-bit 8.5.1FP3 server.

 

Here's the agent code:

 

@If(MarkforDeletion="Yes";@DeleteDocument;"");

SELECT @All

 

Complicated, eh? 

 

Here's the agent log:

 

Started running agent 'DeleteMarkedDocs' on 10/12/2010 01:00:33 AM
Running on new or modified documents: 17733 total
Found 17733 document(s) that match search criteria
Error running agent on NoteID 561 - Greek (8859-7)|Greek (Windows-1253)|Cyrillic (KOI8-R)|Cyrillic (8859-5).  Continuing...
Error running agent on NoteID 561 - B8:22.  Continuing...
Error running agent on NoteID 561 - Server error: Posting not allowed.  Continuing...
Error running agent on NoteID 561 - This key could not be written to your smartcard..  Continuing...
Error running agent on NoteID 561 - Server error: IsEmbeddedInsideWCT.  Continuing...
Error running agent on NoteID 561 - The service has returned a service-specific error code.
.  Continuing...
Error running agent on NoteID 561 - EE:9A.  Continuing...
Error running agent on NoteID 561 - B8:E2.  Continuing...
17725 document(s) were modified by formula
Deleted 2651 document(s)
Done running agent 'DeleteMarkedDocs' on 10/12/2010 01:01:18 AM

 

In addition to hitting up the IBM Support team, I thought I might throw it out to the community, to see if anyone has any ideas.