I cannot get a major upgrade to work. I am upgrading from version 5.2.0.0 to 5.2.8.0 (which I have changed within the IDE); and I am changing the Product and Package codes. (The Upgrade code remains unchanged.) Yet, when I call the new setup.exe file, it begins a clean install, rather than the resume install I expect, as if the product doesn't already exist on the target machine.
I just noticed that the upgrade does appear to be working correctly, though silently and behind the scenes--old files removed, new ones installed. But I know when I tested the major upgrade functionality previously, the "Resuming the Installshield wizard..." screen first appeared, and that isn't the case here. Why is that the case?
You see the SetupResume dialog for minor upgrades. Major Upgrades show the InstallWelcome dialog.
I notice you are using 4 levels of ProductVersion. Keep in mind that Windows Installer only uses the first three levels so, for example, 1.1.1.1 and 1.1.1.127 are both treated as version 1.1.1.
Everything seems to be working fine, with the exception of two entries in Add/Remove programs after the install. I'm using the latest (fixed) ISSEtup.dll that resolves this issue, but since the older setup.exe--already released to the customer base--does not contain the fixed dll, it would seem that I cannot take advantage of the major upgrade functionality until the next release. Or is there another workaround?
So deleting this old product GUID registry entry during the execution of the script will get rid of the original Add/Remove item? Where in the setup.rul file should I delete this registry entry?
