how can i run a custom action only in modify mode

Question

I need to run a custom action only in Modify mode. I tried below condition but it is running in both Modify mode as well as in Repair mode.

Installed AND NOT REMOVE

I am using Installshield 2012 spring.

Answer 1

Flexera's "Common MSI Conditions Cheat Sheet" says:

Sequencing	Condition
Modify	Installed AND NOT REINSTALL AND NOT REMOVE~="ALL"

Answer 2

as far as i know there is no explicit "modify mode" condition. but there are condition for installation and uninstallation, if you exclude both only modify will be left:

Not Installed And NOT REMOVE~="All"

btw modify and repair is basically the same