While trying to activate Gaaiho with a license code, a message shows error code 16 and activation fails.
The license code was disabled and cannot be used to activate software anymore. This could be a result of upgrade or merging multiple license codes.
Since the license code is no longer valid, you should stop using it and try to find the correct code, or contact your colleague in charge of software assets.
Feel free to contact us if you have any question: https://support.gaaiho.com/hc/en-us/requests/new