Ensure you are not attempting to register a single-seat license (like Nessus Professional) on multiple live instances simultaneously.If you need to move Nessus frequently, automate the license reset process using the Tenable API.
C:\Program Files\Tenable\Nessus\nessuscli.exe fetch --challenge /Library/Nessus/run/sbin/nessuscli fetch --challenge 3. Complete Offline Registration
The "License already in use" error can be frustrating when attempting to activate Nessus offline. By understanding the causes of this error and following the troubleshooting steps outlined in this article, you should be able to resolve the issue and successfully activate Nessus offline. Remember to follow best practices for Nessus offline activation to avoid encountering similar issues in the future. If you're still experiencing issues, don't hesitate to reach out to Tenable Support for assistance.
Find your specific activation code and click or the "Reset" button (often represented by a small 'X' or a "Reset Product Activation" link). nessus offline activation license already in use
Confirm the action to change the status back to "Available." Step 2: Generate a New Challenge Code
Open your terminal and run the following command as root or via sudo : /opt/nessus/sbin/nessuscli fetch --challenge Use code with caution. On Windows
Paste the you copied in Step 2 into the first field. Paste your Activation Code into the second field. Click Submit . Ensure you are not attempting to register a
: Keep a secure record of all your activation codes, the email addresses used to purchase them, and the dates they were activated.
nessuscli fetch --register-offline C:\path\to\nessus.license Use code with caution.
Is this instance deployed on a , virtual machine , or cloud environment ? By understanding the causes of this error and
If your evaluation license has expired and you are activating a paid license, the new license may not take effect automatically. You must manually ensure that the new Activation Code has been applied.
/opt/nessus/sbin/nessuscli fetch --register-offline nessus.license Use code with caution. Step 5: Update Your Plugins