Nessus Offline Activation License Already In: Use //free\\

Locate the Nessus activation code that is giving you trouble. Look for a "Reset" or "Unlink" button next to the license.

you must "unlink" the code from the previous installation before the offline registration page will generate a new license for your current challenge code Immediate Fix: Resetting the Activation Code nessus offline activation license already in use

Nessus licensing works on a "one code, one scanner" basis. If you are performing an offline activation, it is highly likely that you (or a colleague) attempted an first. Locate the Nessus activation code that is giving you trouble

licenses are unique to a specific "challenge code" generated by the host machine, you cannot simply reuse the same activation code on a new system without first unlinking it from the old one. Why This Error Occurs If you are performing an offline activation, it

: If the software itself is stuck in a weird state, you can use the nessuscli fix --reset command to wipe existing registration settings on the local host before trying again.

/opt/nessus/sbin/nessus-fetch --challenge