title: Labview case event
body: <p>I am running a VI with a calibration part that is currently executing once at the start of the program. To control it instead by an OK button on the front panel, I replaced the case structure by an event structure. However, the VI now shows an error saying that the array I am converting to a variant is not initialized when I click on the OK button. Any hints?</p>
  
  <p><img src="https://i.stack.imgur.com/g2SOE.png" alt="Case structure"></p>
  
  <p>The false case just outputs an array made of the two single elements in the input</p>
  
  <p><img src="https://i.stack.imgur.com/FXkUZ.png" alt="Event structure"></p>