This might be related to the prerequisite setup itself, otherwise I don't really see why it wouldn't start after the extraction.
What I would advise here is testing the command line outside of Advanced Installer and see if that works as expected. If not, then the problem is indeed related to the prerequisite setup.
I remember I wrote an article about installing SQL Server silently and everything worked as expected back then:
Is it possible to add extracted sql setup files as prerequisites? so then don't need to extract sql setup in Installation process.
following is extracted sql setup,Can I add it as prerequisites?
- add the rest of the files as "Additional files" for the above prerequisite
However, to be fully honest with you, I would advise against it.
What I would advise is getting a correct command line that works as expected both outside of Advanced Installer (if you try to install it from command line) and in Advanced Installer.
For instance, if you add "SQL Server Express with Tools 2014" as a prerequisite from our predefined list of prerequisites, everything works as expected. The files are extracted and then the install starts. If you then add your command line, it only extracts the files and no longer starts the installation. That is probably due to the command line being incorrect.
After further testing, this might be due to the "/x" (extraction) parameter. I believe this basically tells the executable to only extract and thus the installation does not start.
From what I remember, in newer versions of SQL Server, this was not the case as it worked as expected for me (the "Install SQL Server Silently" article I've linked above).