This is a diff between 1.4 and 1.5 revisions:
55a55< SQL> vad_install('../vad/conductor_dav.vad',0);54d55> SQL> vad_install('/opt/virtuoso/vad/conductor_dav.vad',0);
55a55< SQL> vad_install('../vad/conductor_dav.vad',0);54d55> SQL> vad_install('/opt/virtuoso/vad/conductor_dav.vad',0);