Why do Some Icons or Palettes Appear with Question Marks in LabVIEW?

Updated Dec 16, 2018

Reported In


  • LabVIEW

Issue Details

When I open LabVIEW, a number of icons or palettes show with question marks in the Functions or Controls palette. What does this mean and how can I fix it?


If the icon of an object from the palette has a question mark, or the palette is blank, this means that LabVIEW is not able to locate the corresponding file for this object. This could be caused if the file that the icon points to is in the wrong place, was deleted, or does not exist on your computer. To find out where the file is supposed to be located:
  1. Go to Tools»Advanced»Edit Palette Sets...
  2. Three windows will pop up: (a) the Edit Controls and Functions Palettes window, (b) the Controls window, and (c) the Functions window.
  3. In the Functions window, navigate to icon with the question mark.
  4. Right click and select Display Path to Menu File...
  5. The window that pops up will give you the path to the file that the icon looks to. 
The missing file may be a .mnu or .vi file depending on whether the icon represents a sub-palette or VI. You just need to find this file, and put it in the path listed in the window. Make sure that there are no intermediary files in the path that do not belong. If a whole palette is full of question marks, this indicates that the file containing these VI's does not have the correct path relative to the .mnu that it’s governing palette icon points to.

If the file listed in the window cannot be found on your computer, you may have deleted it, which will require you to either do a repair or reinstallation of the driver that supplied the .vi and .mnu files to LabVIEW, or if they come with LabVIEW, do a repair or reinstallation of LabVIEW.


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