To Change Path to a Referenced File (AutoCAD Mechanical Toolset)

Click Structure tabTools panelStructure Catalog. Find
Click the Current Drawing tab.
In the File References section, right-click the referenced file. A menu is displayed.
Select Repath. A File Open dialog box is displayed.
Select the file from the new location and click Open. The path to the reference file is changed.
Note: If you are unable to change path to the referenced file room the structure catalog, use the Xref Manager (XREF command) to change path