I wrote:
>> Hi,
>>
>> I have a wix-based installer in which I want to do a major upgrade.
>>
>> I have an old version of the product that has a custom action that
>> fires during uninstall, unless a property is specified. i.e. If I just
>> uninstall my application, the action fires, but if I 'msiexec
>> /X'{MYGUID-...} DONTDOACTION=1' then it doesn't.
>>
>> I'd like it to *not* fire the action, if I'm uninstalling it as part
>> of the major upgrade.

Rob Hamflett <[EMAIL PROTECTED]> wrote:
> If a product uninstall is happening because of a major upgrade, I   
> believe the property
> UPGRADINGPRODUCTCODE is set.  You could use this to condition your   
> custom action.

Thanks, but unfortunately this is won't work. The old version is  
already out there and in the wild. That particular installer is  
something of a mess, created in installshield, and does a number of  
things that aren't "right".

We want the new installer to be able to uninstall the old version  
without calling the custom action, and we know the property we need to  
set to do this is, but we can't change how the existing installer  
works as it's already on user's machines.

Thanks,
Simon





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