Dismissing reminders in Outlook is not dismissing

[Mjack70]

Dismissing reminders in Outlook is not dismissing.
I have a reminder in Outlook 2003 and I cannot delete. It opens on my screen constantly.

When I click Dismiss this is the message I get. Cannot Turn Off Reminder. One or more values are not valid.

I have tried /cleanreminders startup switch and also recreate profile twice. It works fine for about a month and then it's stops dismissing again. This is the third time. What else can I do beside reinstalling Outlook? Tried detect and repair. Outlook 2003 SP2
Any known issues?

 

[brontosaurus]

There is a tool called mfcmapi.exe that you can download from M$. It will allow you to open your mailbox database, from which you can find the offending appointment and delete it from your calendar.

 

[Mjack70]

so it's due to a corrupt appointment?

 

[brontosaurus]

That's my guess. I've seen it happen a couple of times and removing the original offensive appointment was the cure.