Our setup consists of 2 single Installscript Projects. The first setup handles the User interface and the second setup handles the prerequisites and the installation routine. We had to do this because the prerequisites depend on the decisions of the user interface. So, when the user interface setup has finished, it writes some data into the registry (for the prerequisite conditions) and starts the second setup (LaunchApp). Everything works fine so far. A new installation works good with or without prerequisites. BUT we have a problem on an update. If the setup wants to perform an update and needs to install some prerequisites the second setup won't start! It's really strange because I can see the second setup.exe in the taskmanager, but nothing appears on the screen. If we perfom an update without prerequisites everything works find... We tried to change some prerequisites settings, but nothing works. The second setup won't show up in update mode with prerequisites...
I know it's a quite special problem, but we are simply stuck here. Any hints or tips would be great.
Is it possible that the code in the prerequisite installer as not been updated, so the installation looks and determines that nothing needs to be done and immediatly terminates?
