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DonAIR
Level 6
‎Feb 14, 2018 08:09 AM

ISPreventDowngrade not functioning, thinks newer version found?

No matter what options we choose we get 2 outcomes:

1. It doesn't remove the old version and just installs the new version along side it
2. It complains that a newer version is found and exits out.

Old Version: 5.0.0.2793 (I know 4th digit is meaningless)
New Version: 6.0.0.xxx

We have tried pretty much every option under the Advanced/Common tab. We have recreated it. Still nothing. The product has a DIFFERENT Product Code and the SAME Upgrade Code. This works fine in our InstallScript MSI packages, but the Basic MSI packages fail with this.
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dan_galender
Level 10
‎Mar 07, 2018 10:29 PM

What does your Major Upgrade Item look like?

How about attaching a Windows Installer Log file?
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