Without actually seeing the problem document, it can be difficult for anyone to diagnose the issue. That said, files created in OpenOffice are not fully compatible with Microsoft Office, despite impressions to the contrary often given by OpenOffice's advocates. Can you attach a document to a post with some representative data (delete anything sensitive)? You do this via the paperclip symbol on the 'Go Advanced' tab at the bottom of this screen.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]