Click the button (often an 'X' or a reset link) next to the code.
Nessus Professional and Expert licenses are generally restricted to at a time. When you register an activation code, Tenable's backend ties it to that specific host's hardware signature. You will see this error if: nessus offline activation license already in use full
On the where Nessus is installed, you must generate a unique "challenge code" that identifies that specific system. Update License Offline (Tenable Nessus 10.12) Click the button (often an 'X' or a
Your previous installation crashed or suffered a hardware failure, leaving the license "locked" to a non-existent machine. nessus offline activation license already in use full
Once the code is reset, you can proceed with the offline registration process. Generate a Challenge Code