Outlook npoi error when saving contacts

We have a public folder that suddenly appears to have developed the problem of every time we try to save any changes to existing items we get a message box that says "npoi" and will not let us save the changes
Help!
danw2Asked:
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SMosherConnect With a Mentor Commented:
Well, I'm sure stumped. "npoi" doesn't mean anything to me and isn't in the KB. You might try changing the permissions by adding someone new to the list, then checking whether they can save anything.
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pyleoCommented:
DOes anything else happen E.G. conflict checks or anything?

What Version of the client, server etc are you using
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SMosherCommented:
Are the existing items using a custom form? If so, check the code in the Item_Write and Item_Close event handlers on the form for clues.
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danw2Author Commented:
Gone to View Code and Looked in the script editor but no code exists at all.
Is there another place the code could be hiding!
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SMosherCommented:
No, that's the only place where code might lurk. Did you check the folder permissions? What do you see as the title of the window that pops up with the error?
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danw2Author Commented:
Permissions are three people Owner
Default None
Anon None
Window says Information Microsoft outlook

npoi
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danw2Author Commented:
Permission did not work but im reading your book Outlook 2000 programming at the moment and it is exellent so you can have the points just for that.
My email address is dan.winters@tdk.co.uk if you have any more tips or comments
Thanks for your effort
Dan
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