Given: Basic MSI application, two releases, uncompressed and compressed. Both releases compile OK. Compressed version 1.0.0.0 installed OK.
Added an Automatic Upgrade to the project, pointed it to the uncompressed 1.0.0.0 build msi file, changed Package Code, changed product version to 1.0.1.0, kept product code and upgrade code the same; re-compiled just the compressed release -- the output window said it resulted in a minor upgrade. No build warnings or errors.
But when I try to install version 1.0.1.0, a Windows Installer dialog states "Another version of this product is already installed...". I have read other threads that talk about this problem regarding a major upgrade, but that's not the situation with my project.
Are you building a setup.exe wrapper? If not, then for a minor upgrade to work, you must include REINSTALL and REINSTALLMODE properties in the command line when you run the MSI. (Setup.exe will set these automatically for a minor upgrade.)
