I have a product and the version is 1.3.9. It has a severe bug when uninstall it. I fix the bug and make the product 1.4.0. Then I want to overwrite the 1.3.9 version whitout unintall it. Is there anyway to do that?
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Minor Upgrade: Yes, you need a minor upgrade. It upgrades the product in-place and does not trigger uninstall. After that is done you can run the uninstall - now with a corrected uninstall sequence - and you can use major upgrades again the normal way - but you need to migrate yourself out of trouble with a minor upgrade. Minor upgrades have many limitations.
Note: it is also a problem that when your next version comes along you need to provide a minor upgrade again to migrate users who are still at the problem version. There are various approaches here - such as using the same minor upgrade wrapped in a setup.exe launcher.
Clunky Version: You can also make the new version ask for the user to manually uninstall the previous version. Not a good solution, but possible. Then you avoid the need to have to deliver a migratory minor upgrade as part of future launchers?
Maintanence of minor upgrades for broken major upgrade fixing (Michael Urman of Installshield)
Various Fixes: There are many hacks and tools you can use to clean this problem out, none are ideal (do visit that link).
Stein Åsmul
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