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Editorial Team
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Asked: 2026-06-17T04:57:30+00:00

I have an MSI project that I want to convert to a merge module.

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I have an MSI project that I want to convert to a merge module. The writing of files was simple enough to replicate.
However, I am struggling to replicate the Custom Actions.
I need the Custom Action to execute from the merge module.

This is what my custom actions in my MSI project looks like:

enter image description here

UPDATE:

I found the problem.
In an MSI project, the name your directory that you create; Remains the same that is if I create a folder FBB Installer Files; in your direct Editor under Directory the Key name will be FBB_INSTALLER_FILES; however if you do the same thing in a Merge Module the Key will be set to FBB_INSTALLER_.984DBBFF_9C1E_46C0_9E76_BF6D4CE53321. Basically a merge module appends a GUID to the name of the key.

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1 Answer

  1. Editorial Team

    Merge module’s don’t get executed as they don’t get shipped with the installer. They get consumed during the build and merged into an MSI. The CustomActions get listed in the Module*Sequence tables with instructions to merge before or after standard actions.

    Other then you have to think a bit more abstract and bulletproof because the module has to work within the context of more then one product MSI, there really isn’t anything different.

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