To Import a Previously Exported BOM (AutoCAD Mechanical Toolset)

Click theClick Annotate tabBOM panelBOM. Find
Press ENTER.
In the BOM List panel, right-click the BOM to edit and select Set current. The icon indicates the current BOM.
In the toolbar, click the . drop-down menu and select Import. The Import dialog box is displayed.
In the Files of type list, select the file format to import from.
In the Look in list, select the folder that contains the file to import.
In the Files list, select the file to import.
Click Open.