The Validation Results panel is in effect a message area, displaying the IFPUV response to the Validate action:

• If the submitted flight plan is correct, the message is NO ERRORS. The flight plan is therefore considered as being valid:
  
  
• If the submitted flight plan is not correct, a message indicating the affected parameter and the nature of the error is displayed:
  
  
  
  You can then make the necessary corrections and resubmit the query, until the "NO ERRORS" message is returned.