How to troubleshoot Standard Action in MSI Installshield that did run on /qn parameters
There's an MSI that a standard action wasn't running on /qn parameters. The name of action is "ProcessComponents"
Community Chosen Answer
Check the sequence tables (InstallUISequence & InstallExecuteSequence) to see if your action is in one or both?
I suspect that it's missing from the InstallExecuteSequence, so add it in to match where it is in the other table and test.
Either that or there is a condition that is preventing it running.
Hope that helps,