My bet is that something is awry in the upgrade logic on the MSIs. If you
look at the Burn log, the plan should show you what it is doing for each
MSI. That plus the Upgrade (or MajorUpgrade) elements can explain a lot
about what is going sideways.


On Thu, Apr 4, 2013 at 11:16 AM, Alain Forget <afor...@cmu.edu> wrote:

> You're sure setting the DowngradeErrorMessage attribute of the MSI A's
> MajorUpgrade element doesn't do the trick? It seems to work
> for me.
>
> Alain
>
> -----Original Message-----
> From: Wesley Manning [mailto:wmann...@dynagen.ca]
> Sent: April 4, 2013 14:13
> To: General discussion for Windows Installer XML toolset.
> Subject: [WiX-users] bundle - do not downgrade MSI
>
> Hi,
>
> If I have two bundles B1 and B2.
> B1 installs MSI A v1.0 and MSI B v1.0.
> B2 installs MSI A v2.0 and MSI C v1.0.
>
> Currently if I install B1 after B2, B1 will downgrade MSI A to version
> 1.0.  How can I prevent this?  It seems like the MSI itself
> cannot control this (I have major upgrade element in MSI) as burn
> uninstalls the existing MSI (at v2.0) and installs v1.0.
>
> B1 and B2 are addons that can be installed by customers and I can't
> control the order of execution.
>
> Wes
>
>
>
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Reduce network management and security costs.Learn how to hire 
the most talented Cisco Certified professionals. Visit the 
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http://www.cisco.com/web/learning/employer_resources/index.html
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