The error is a specific technical message often encountered when using third-party activation tools (like Xforce Keygen) for software such as Autodesk AutoCAD . It indicates that the activation tool cannot write the necessary license data to the system memory because the software's license verification process hasn't been "patched" or bypassed at the correct moment . Root Causes of the Error
If a license screen appears again:
This error typically arises in situations such as: error you need to apply patch when licence screen appears