LabVIEW Probe Watch Window Not Appearing

Updated Nov 3, 2020

Reported In


  • LabVIEW


LabVIEW Development System

Issue Details

When I create a probe in LabVIEW, I can see the probe label on the block diagram, but the Probe Watch Window does not appear on screen. There is no error message, but I am unable to see the value associated with any of my probes.


This issue can occur when the Probe Watch Window position or size has accidentally been set such that it is no longer visible on your display and is especially common for multi-monitor setups.

The size and position of the Probe Watch Window can be reset by following the steps below.
  1. Close LabVIEW
  2. Navigate to the LabVIEW directory.
    • For 32-bit versions LabVIEW, navigate to C:\Program Files (x86)\National Instruments\LabVIEW 2019
    • For 64-bit versions of LabVIEW, navigate to C:\Program Files\National Instruments\LabVIEW 2019
  3. Right-click on LabVIEW.ini and select the "Edit" option.
  4. In your text editor, find and delete the line that begins with "WatchWindowPos". (This will reset the default size and position of of the Probe Watch Window.)
  5. Save and close the file