Nessus Offline Activation License Already In Use ^new^

: C:\Program Files\Tenable\Nessus\nessuscli.exe fetch --challenge Linux : /opt/nessus/sbin/nessuscli fetch --challenge

If the problem persists after trying these steps, open a support ticket with Tenable. Provide them with your Activation Code and the output of nessus-fetch --challenge . They can manually clear the lock from their backend database. nessus offline activation license already in use