INSTALLDIR property at uninstall

[dlemil]

Hello, I need to do a custom action to run one file that is in a subfolder of installdir, which is not present in "Directory" table from the msi.
In VBScript I need to find installdir, then add the path to my file. The problem is that

foldername = Session.Property("INSTALLDIR")

does not return anything, the foldername remain blank.

Any ideas?

PS: this line works at install, only at uninstall it doesn't get the installdir. and i need it at uninstall

[kayaker]

What's the custom action property? is it deferred execution in system context or other type?