I am attempting to determine if a specific version of a product is already
installed on the system. I basically want to do this to disallow/bail out
of an install if the MSI that is being executed is already installed on the
system.
Here is my authoring using 3.0 RTM. I must be missing something simple:
Upgrade table. FWIW, Product and Upgrade GUID is not changing for each
build; only GUID that is changing is the Package GUID. Language attribute
matches as well.
<Upgrade Id='$(var.UpgradeCode)'>
<UpgradeVersion Minimum='$(var.ProdVer)'
IncludeMinimum='yes'
Maximum='$(var.ProdVer)'
IncludeMaximum='yes'
OnlyDetect='yes'
Language='1033'
Property='SELFFOUND'/>
</Upgrade>
Check to see if product previously installed *and* is this specific version.
<Condition Message="We be here!">Installed AND SELFFOUND</Condition>
Thanks.
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