You previously said the bookmarks had something to do with a textmining application, but you still haven't explained how the bookmarks are relevant to that, especially since you then go about deleting them. I fail to see why you'd need them for navigation purposes, either.

Besides, if you close the documents without saving changes, you don't need to delete the bookmarks.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]