Unlock DLLs

After unpacking the plug-in installation package, you unlock the dlls from it.

By default, Windows blocks the installation of DLLs that it could not verify security.

This occurs with CHM extension help files.

To resolve:

  1. With AutoCAD closed, right-click on the DLL or CHM.
  2. Click Properties
  3. Click the Unblock button on the General tab:    

Note: The Unblock button (or the checkbox) does not always is available. If it is not available, it is already Unlocked

Open AutoCAD and NETLOAD or APPLOAD again.

Still it did not work?

Do you have all the files in the folder? Check


Close AutoCAD.

Follow the procedure Load From Network