First off, this differs from the question handle "Another version of this product is already installed. Installation of this version cannot continue..." because this is not a development error- my users are seeing this error as well when they try to modify the installation.
Here's the problem: I can install my latest version of the application and everything works fine. However, if I run the same installer again, rather than giving me the maintenance options (Repair/Modify/Remove) I get the above error, the full text of which reads:
Another version of this product is already installed. Installation of this version cannot continue. To configure or remove the existing version of this product, use Add/Remove Programs on the Control Panel.
I can run the uninstall from the Add or Remove programs without incident, but I don't want my users getting this message if they need to fix the installation. I have some custom scripts but otherwise my install sequence is unmodified. When I try to run the verbose logging command, it launches the installer and the error occurs, but no log file is created. That command is foo.exe /verbose".\LogFile.log"
Bumping the revision changes nothing. It will upgrade the first time it's run, but then it displays the same error. I'm using InstallShield 2021 R2.
