sWORDs
VMware Employee
VMware Employee

Actually the productcode and upgradecode should not be equal between the two (excel and access are different products). And changing the guid manually shouldn't be an issue as long as it's unique on that system.

There are three guids in a msi:

Package Code - To identify the package if even a bit of the msi changes so should the package code

Product Code - To identify the product

Upgrade Code - To identify a set of products (when upgrading you can use multiple upgrade codes to upgrade from)

The error you're getting seems to be with the package code or in the upgrade table min version is not set (or is higher then the current version).

Besides that your installer registry keys might be dirty, check the entries in HKCU and HKLM. You might have some leftovers with the same Product Code, or try to use a dirty machine/profile.

And Peter, nice avatar, I can actually recognise you,

Hilko (Apeldoorn, Netherlands)

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