User Guide

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Troubleshooting Custom Actions

If a custom action doesn’t work:

! Try moving it to a different sequence, or to a lower position in the current sequence.

! Does the custom action require elevated privileges? If so, try running it in the

Execute Deferred sequence. On the custom action’s Properties tab, set the In-Script

Options drop-down to Deferred Execution - System Context.

! Make sure the custom action name is unique. To quickly survey your custom actions,

select All Custom Actions from Installation Mode.

! Does the custom action reference a Windows Installer property, such as REMOVE?

Windows Installer standard actions set Windows Installer properties. It could be that

the property your custom action is referring to is not set yet. Use the debugger to

discover whether the property is set at the point where you expect it to be set. Keep

moving the custom action down in the sequence until it works.

! Is the installation attempting to change restricted public properties? The ability to do

this depends on several factors. See Restricted Public Properties in the Windows

Installer SDK Help.