You can change the file path to a referenced DWF, DWFx, PDF, or DGN file or search for an underlay when it is reported as not found.
When you open a drawing with an attached DWF, DWFx, PDF, or DGN file, the path of the selected underlay is displayed in the External References palette under Found At in the Detail list. The displayed path is the actual path where the source file was found. The path where the source file was originally attached is displayed under Saved Path.
To locate the file, the program searches the following paths and folders in the following order:
If you open a drawing that contains a DWF, DWFx, PDF, or DGN file that is not in the saved path location or in any of the defined search paths, the External References palette displays Not Found in the Status column of the File References list, and the Found At entry is blank in the Details list.