I'm new to installer script, especially MSI. I've been testing for couple of days and reading the forum again and again, yet I'm still stuck in below situation:
- I manage to install multiple instances with each has its own Product Code.
- Each instance could be uninstall from "Program and Features" accordingly.
- If only 1 instance installed, upgrade works fine with latest files being copied.
- Problems when upgrading one of multiple instances:
- Files under the selected instance has been removed after "Remove MSI Package".
- No file is copied after "Apply Install".
- Uninstall works fine for rest of the instances except the first installed instance.