Some licensing servers mishandle IPv6 TOP requests.
“Or what?”
Open Command Prompt as Administrator and run: registrationactivation error 001522 top
(often shortened as error 0015) typically occurs during the activation process of Autodesk software, such as AutoCAD or AutoCAD Architecture . This error usually indicates a problem with the licensing information on your computer, such as a corrupted file or an incorrect activation code entry. Common Causes Some licensing servers mishandle IPv6 TOP requests
Background applications can interfere with the registration process. registrationactivation error 001522 top