@poisedforflight
I take it event_data_ProcessName is the field your searching, and in the field is you have path to the exe.
Have you tried to execute “Show top values” for the field event_data_ProcessName?
For an example, I created a filed called “service”.
Shown below would be all the data in that field for a day. I believe this would give you a better over view. If your data you want is not shown I would check on you client side to see if its working.