I have just worked with this case - and in my case I was able to circumvent the problem

HCL Notes/Domino 8.5 Forum (includes Notes Traveler)

Subject:

Very shortly, the Notes client and the LotusScript classes get messed up when it receives a single MIME attachment (a graphic in our case) - leading to problems between the back-end (NotesDocument) and front-end (NotesUIDocument). The MIME attachment is erroneously regarded as a valid - ordinary - attachment and methods linke NotesDocument::HasEmbedded erroneously reports true. As soon as my LS code try to enumerate the attachments, the Notes 8.5 (or Notes 8.5 FP1 for that matter) bails out.

The interesting part is that the Notes client itself is able to work with the mail. So I can enter edit-mode, and for example save the document manually. This operation actually fixes the document - as you can note that the MIME image graphic now typically reverts to an ordinary attachment etc. Additionally, by DROPPING the document in my LS document (use Set doc = Nothing) and reloading it with its UNID reloads the corrected document, and NotesDocument/NotesUIDocument is again in sync!

A Notes 8.5.1 client has no problems in my case, but I know of at least one customer having issues with 8.5.1 clients too. This leads me to suspect perhaps template versions on the mailbox, and perhaps how each Designer saves stuff here.

Hope this shed some light on your problem.

Bob
Proud Programmer!

Feedback response number RIVH7X9FKP created by ~Emile Reluteretsi on 10/28/2009