XREFs

External reference files (XREF) are similar to Hotlinked Modules, except that they are DXF or DWG files and not ARCHICAD files.

See Hotlinked Modules.

External referencing is a way of saving disk space and work. You can attach a DWG or DXF file to your Floor Plan or to a Detail; the file will be loaded into the Project and displayed, using the settings of the DXF/DWG Translator you have selected.

You can snap to all drawing elements within the XREF and print or plot them.

A common use for XREFs is to draw elements that are common to several kinds of drawings within a Project (e.g., the outlines of exterior and interior walls). If you have a file containing this data, you can attach it to other drawings that can use the geometric information contained in the XREF file without the Project file actually having to contain the data. Also, if the source of the data in the external reference (the DWG or DXF) is changed, then these changes can be updated immediately so the latest data is always available.

XREF is available in both ARCHICAD and AutoCAD - both applications can detect circular references.

In ARCHICAD, external reference files work much as they do in AutoCAD. ARCHICAD XREFs can display 2D elements from DWG files, but three-dimensional AutoCAD elements (such as Solid elements) are not visible in ARCHICAD’s 3D window.

Note: If any of the functions described do not work properly, the DXF/DWG Add-On may be missing, or the DXF/DWG Translator is not set. You can check this easily by choosing File > Open and looking for the appropriate file types in the Files of type field. The missing Add-On can be loaded with the Add-On Manager command in the Options menu.

Attach XREF

From the Floor Plan, Detail or Worksheet window, use File > External Content > Attach XREF.

The Attach XREF dialog box appears.

From the XREF Name pop-up, choose from the list of XREFs already loaded in the project, or click Browse to browse for a DWG or DXF file to attach.

Set insertion and rotation options as needed.

See Attach XREF Options for details.

Choose a DWG/DXF Translator which will determine conversion options for the attached file (or just use the default translator shown). Click Settings to view the options for the current translator.

Click Attach.

You can attach and detach XREF files in ARCHICAD, unload and reload them, bind them to the project file and view information about them. These functions are available in the XREF Management Dialog box (File > External Content > XREF Manager and File > Attach XREF).

Note: You should not attach XREFs from different locations if they have the same file name, because AutoCAD cannot open such files. (If they have the same name but different file extensions - DXF vs. DWG - this can still cause problems.)

Manage XREFs

To manage XREFs attached to the project, use File > External Content > XREF Manager.

The XREF Management dialog box displays information about the attached files, including the name of the reference (usually the same as the attached file), its status (Loaded, Detached, Reloaded, Unloaded or Bound), size, type (Attach or Overlay), Date and the number of instances, as well as information on the translator used to open each XREF.

For details, see XREF Management Dialog Box.