One way is to send a Halt command to the consumer loop via the queue. After the code executes the Shutdown case, wire a True to the stop terminal of the loop. For your system, you might consider separating the Shutdown and Error Handling into different states unless every error will force a shutdown. If an error forces a shutdown, then you need a means of notifying the Producer loop that the Consumer has shutdown.
Why do you have the Event structure inside a for loop set to iterate 10 times? To send anything to the queue the user would need to push the Confirm Input or Stop buttons a combination of 10 times before anything goes into the queue. To stop the loop the last of those ten presses would have to be the Stop button.
Lynn
