I have two versions of my MSI... one is version 1.0.0.0 and another is 
2.0.1000.0. The upgrade code for both the MSIs are the same. But, there are 
many significant differences between version 1.0.0.0 and 2.0.1000.0, including 
different install directories and files-to-install. Version 1.0.0.0 installs 
under 'Program Files\Orange' whereas version 2.0.1000.0 installs to 'Program 
Files\Red'. There are no similarities between version 1.0.0.0 and 2.0.1000.0 
except the upgrade code.

But, even when the upgrade codes are same, version 2.0.1000.0 is unable to 
detect the previous version '1.0.0.0'. I have the following element defined 
within my wix file:

        <Upgrade Id='B5521437-2271-4c41-9F5D-58D4F960874C'>
            <UpgradeVersion OnlyDetect='no' Property='PRODUCTOLDVERSIONFOUND'
                            Maximum='2.0.1000.0' IncludeMaximum='no'/>
        </Upgrade>

But, seems the old version is not getting removed/replaced by the new version. 
The new version installs/uninstalls as a separate product.


What am I doing wrong?


Thanks.
Sudripta.
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