[wix-users] How to run CA only on Uninstall

[Mark Vulfson]

I am trying to get my Custom Action to ONLY run on honest to goodness
uninstall (repair is acceptable) but I can't seem to get the condition
quite right.
The CA keeps running on minor upgrade always (i.e. maintenance mode).

This is what I tried:

            <Custom Action="UninstallOnlyCA" After="RemoveFiles">
          <![CDATA[(NOT UPGRADINGPRODUCTCODE) AND (REMOVE="ALL")]]>
        </Custom>

and:

            <Custom Action="UninstallOnlyCA" After="RemoveFiles">
          <![CDATA[REMOVE~="All" OR MaintenanceMode="Remove"]]>
    </Custom>


Neither gets me what I want. How can I make it run only during an actual
uninstall not during upgrade, not during maintenance mode, or install?

Thanks!
Mark