Using a FindChart to delete a Vserver only if no non-root volumes remain?

[calving]

Greetings WFA Gurus,

I request your advice and assistance on using a FindChart or some other mechanism to delete a Vserver only if there are no non-root volumes left assigned to the Vserver.

My goal is to have a workflow that cleans up unwanted volumes and Vservers several days after the unwanted volumes are unmounted and offlined.

• I've created a Workflow (attached) that deletes the specified volume from the specified Vserver and then deletes the Vserver.
• I created a Finder that finds non-root volumes other than the one specified and I created a FindChart that defines a variable called NonRootVolumes.
• In the "Remove CM Vserver" command, I'm trying to figure out how to use the "Advanced" tab to "Execute this command" only if there are no remaining NonRootVolumes._found, but there is only a "Only if the following expression if TRUE" option in the pull-down list. 

How can I negate the _found variable?  I tried using "!" and "NOT", but nothing seems to work for negating the true to false.

Thanks in advance for any advice you can provide!