# MS Outlook Question: Mapisp?

**URL:** <https://boards.straightdope.com/t/ms-outlook-question-mapisp/59541>\
**Category:** Factual Questions\
**Created:** [March 26, 2001, 2:45pm UTC](https://boards.straightdope.com/t/ms-outlook-question-mapisp/59541 "2001-03-26T14:45:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sdimbert](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/sdimbert/32/20204_2.png) [@sdimbert](https://boards.straightdope.com/u/sdimbert)\
**Post date:** [March 26, 2001, 2:45pm UTC](https://boards.straightdope.com/t/ms-outlook-question-mapisp/59541/1 "2001-03-26T14:45:54Z")

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Every time I launch **MS Outlook** , I get an error that says, “This Program has performed an illegal operation and will be shut down.” The error window’s Title Bar says “Mapisp.”

I’m running **Outlook 97** in **Windows 98** and, to the best of my knowledge, I haven’t done anything new or unusual lately to screw up my system.

Anyone know anything that could be helpful?

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**Author:** ![PolishSausage](https://avatars.discourse-cdn.com/v4/letter/p/a9a28c/32.png) [@PolishSausage](https://boards.straightdope.com/u/PolishSausage)\
**Post date:** [March 26, 2001, 5:18pm UTC](https://boards.straightdope.com/t/ms-outlook-question-mapisp/59541/2 "2001-03-26T17:18:03Z")

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Not sure if this will help but…

It sounds like a system file that Outlook uses might have become corrupt or another program might have changes the version of that file. Not a big deal, reinstall Outlook and things should be fine. _fingers crossed_ 🙂

~t