When AutoCAD opens a file that has been modified by LinkFixer Advanced, it presents the user with a warning message.
LinkFixer Advanced uses the libraries from Open Design Alliance (ODA) to open and modify DWG and DGN files. AutoCAD notices the fact that these libraries are not the "official" AutoDesk libraries, and produces this message. Every tool that uses the Open Design libraries will produce this same message in AutoCAD.
This message will occur the first time AutoCAD users open files that have been modified by LinkFixer Advanced.
We recommend that you alert your users that this message will be displayed, and that they will not have any issues with the modified files after accepting this message.