I then bumped up the Product Version and said "No" to generating a new Product Code.
Multiple instances side by side with minor updates are not supported. Side by side only works with major upgrades. There are two supported behaviors:
- you can either use a small update to update already existing instances
- or you can use a major upgrade and install side by side (side by side installation needs to be enabled for both versions, the upgraded one and the target one)
"Maintenance dialogs for multiple instances were not handled correctly"
I could create a little test project in which "Multiple Instances side by side with minor updates" seems to work now.
From what I know in your other posts, you are authoring a major upgrade scenario( ProductCode changed between versions ).
Existing instances are not correctly upgraded.
Version set to 2.0 and answered with "Patch" (I want a minor upgrade).
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