I'm writing an installer using WiX 3.5 for the latest version of our software. The installer for previous versions was written using InstallAware 8. During install I want to remove the old versions but InstallAware does some strange stuff so the normal RemoveExistingProducts method doesn't work. Neither does msiexec /x {PRODUCTCODE}.
When RemoveExistingProducts runs it pops up a dialog asking for the location of the .msi file from the old install. I can find the location of it in the registry and if I enter that location in the dialog the uninstall works fine. However I'd like for the dialog to not show, is there some way I can tell RemoveExistingProducts where to find it?
It seems that some rules of avoiding prompts for source are violated. See if these recommendations help.