Volume License Manager (VLM) Fails to Launch with Unknown Error

Updated Oct 29, 2018

Reported In

Software

  • Volume License Manager
  • Volume License Manager 3.0
  • Volume License Manager 3.1

Issue Details

Every time I try to open NI Volume License Manager I receive an error message stating:

An unknown error has occurred. Contact National Instruments for technical support at ni.com/support

Solution

  • Restart the server.
  • Restart the NI License Server.
    1. Click Start»Control Panel»System and Security»Administrative tools»Services.  
    2. Locate NI License Server.
    3. Right click and select Stop.
    4. Right click again and select Start
  • Make sure you have installed the latest Windows and National Instruments software updates.
  • Force Reinstall VLM.
  • Contact NI support and reference this KnowledgeBase article

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