Manually changing the path for external reference files is something almost all of us have done at one time or another. Tip author Clinton Cogswell uses this LISP routine to perform a quick find-and-replace on xref paths in the current drawing. Start by loading the LISP file, then type in the command PATH. Enter the portion of the xref path that needs to be replaced, and then enter the new path. The LISP code searches the block table for xref paths that contain the string you specify, makes the path replacement, and reloads the xref. Be sure to use the correct case when specifying the old path, as it is case sensitive.