My LabVIEW License is Expired, Corrupt, or Lost

Updated Jun 6, 2018

Reported In


  • NI License Manager
  • LabVIEW
  • NI License Manager

Operating System

  • Windows

Issue Details

I have been using LabVIEW for a while, but am now getting a message that my license is expired, corrupt, or lost or the Local Licenses tab is now blank in NI License Manager. I have tried to enter my serial number, but according to LabVIEW the resulting activation code cannot be applied. How can I reactivate LabVIEW and/or repopulate my Local Licenses tab in License Manager?


If your license files have expired, been corrupted, or lost you will need to replace them with the default LabVIEW Evaluation License Files. These are the license files that install with LabVIEW before the software is activated. They do not contain corruptions. You can search for and download the Evaluation License Files that match your version of LabVIEW at

Use these downloaded files as replacements for the expired, corrupted, or missing license files. For more information about the location of these license files in the Windows directory, please refer to the KnowledgeBase Article Where Are My Local National Instruments License Files Stored on My Windows Computer? Remember to save a backup version of your license folder before altering its contents. If there is no license folder, create a folder in the directory in the linked article above called "Licenses" and place the license files in that folder.

After you insert these license files to the Licenses folder, your software will operate under evaluation mode. You can fully reactivate the software in the NI License Manager by right-clicking on the name of software in the tree and selecting Activate. Then, follow the prompts to activate LabVIEW using your licensed serial number.


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