Hi,
Please note the you should use a public property (all uppercase letters) instead of a private property. This is recommended because Windows Installer will not pass the value of a private property from the "InstallUISequence" (when the property is initialized) to the "InstallExecuteSequence" (when the property is used by a custom action).
You can read more about installer properties here:
http://www.advancedinstaller.com/user-g ... rties.html
Also, the default value of the property should be specified in the "Install Parameters" page (recommeded), by a "Property set with formatted" custom action or by a control event (for example a button).
I noticed that you did not mention the Execution Option used by a custom action. Note that in order to allow the custom action to access an installer property, you should set it as "Immediate".
If the problem persists after making the necessary modification, please send us the AIP to
support at advancedinstaller dot com so we can investigate it.
Regards,
Ovidiu
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Ovidiu Blejdea
Advanced Installer Team
http://www.advancedinstaller.com