I have two installers, one solely for installing prerequisites, the other being the main installer. The prerequisite installer itself is a prerequisite for the main installer. The issue that I'm having is that the main installer prematurely starts installing when the prerequisite installer itself has not finished due to the fact that it has a feature-install (resulting in getting the "Another program is being installed" error). This occurs only on silent installs, not normal installs.
I have followed instructions from https://www.advancedinstaller.com/user- ... sites.html, and set AI_LaunchChainer to 1266 against the prerequisite installer. This still results getting the "Another program is being installed" error. I did not see the AI_LaunchChainer in the CustomAction table of my main installer so I'm not sure if it should be applied to that. Any suggestions?