Building a flow counter or action flow termination´in order to prevent multiple flow executions.

Hi all,

I am constructing an input checker that checks if a list is empty or not before executing a Skill that sends it out in an Email.

It is supposed to wait (sleep) and repeatedly load (Get Rows) the input till it is not empty and then send it out once.

As a way to prevent a double execution i´m trying to create a flow counter that filters the flows if the list has been loaded with content and already sent in order to prevent multiple executions. Sadly incrementations of the counting variable only work along a single flow.

Is it possible to create a variable that is globaly increased? Or a method/tool to terminate the action flow the moment a specific execution skill has been used? Alternatively I would have to build a router that filters if there is a first item in the list or it is empty and stops the moment it is filled.