Outlook 2003/2007 on same PC

[Caleb Mochari]

I recently had an occasion to install Outlook 2003 back on my PC (I
need it for stamps.com). When I try to start it I get this error:
"Cannot start MS Outlook. MAPI32.DLL is corrupt or the wrong version.
This could have been caused by installing other messaging software.
Please reinstall Outlook."

I only plan to use the contact feature of Outlook '03 and that is only
when I use stamps.com. I suspect (perhaps foolishly) stamps.com will
soon have an Outlook 2007 add-in and I will be fine. Until then, does
anyone know of a workaround?

I am using a trial version of MSO 2007 Professional until my Action
Pack arrives (it was allegedly shipped last week).

Thanks

 

[Vince Averello [MVP-Outlook]]

You can't run two versions of Outlook on the same PC.

 

[Gordon]

You can't run two versions of Outlook on the same PC.

Is there a site somewhere that explains WHY? because you can certainly run
two versions of every other Office module, other than Outlook.....

 

[Laura]

You cannot have two versions of OUTLOOK on the same computer.

 

[Patrick Schmid [MVP]]

Because some of the components used by Outlook (DLLs) are system-level
DLLs (the entire MAPI e.g.) and there can only be one version of each on
your computer. Any Outlook can only work correctly with its versions of
those DLLs and hence it is impossible to have two versions installed on
the same computer.

Patrick Schmid [OneNote MVP]
--------------
http://pschmid.net
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[Gordon]

Because some of the components used by Outlook (DLLs) are system-level
DLLs (the entire MAPI e.g.) and there can only be one version of each on
your computer. Any Outlook can only work correctly with its versions of
those DLLs and hence it is impossible to have two versions installed on
the same computer.

Thank you for the info - I often wondered about that!