<br>Hi Yong, Apparently, it's being hidden at run-time using Property Nodes. Here's how you can find and fix this part of the code: on the front-panel, right-click on your graph and select Find>>Property Nodes. This should either take you to the property node on the diagram, or bring up a box -- when there are more than one -- with the list of property nodes.
Visit each Property Node and find out if the 'Visible' property is being set to False anywhere. That's the culprit! Adios! <i>Khalid</i><p>
