I have a requirement to allow 'overwrite' of same version. I've tried
various combinations of <Upgrade>, here is my current:
<Upgrade Id="INSERT_GUID_HERE">
<UpgradeVersion OnlyDetect="yes" Property="SELFFOUND"
Minimum="1.0.0" IncludeMinimum="yes"
Maximum="1.0.0" IncludeMaximum="yes" />
<UpgradeVersion OnlyDetect="yes" Property="NEWERFOUND"
Minimum="1.0.1" IncludeMinimum="no" />
</Upgrade>
and in InstallExecuteSequence I have:
<RemoveExistingProducts Before="InstallInitialize" />
I think the 'right' thing to do is to require uninstall and then reinstall
'manually', but my requirement is to allow user to go through installer
forms - using custom managed BA - and change values, including
'INSTALLLOCATION'. I've been able to handle a 'Modify' operation correctly
in the BA, showing all required screen with values from previous install
filled. Is there some way to force MSI to uninstall itself then install
again? I suppose I could, from the BA, run the msi with /uninstall options
then run it again with /install options but is this the best way to do
something like that?
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