[mkgmap-dev] no success with --index

Hi I've been trying to create mdx files using --index but to no avail. java -Xmx1024m -jar mkgmap.jar --remove-short-arcs --gmapsupp --family-id=2611 --tdbfile --index --keep-going K:\a_mapsource\mapfeb.osm these are the only files I get: 63240001.img 63240000.img 63240001.tdb Am I missing something? Nick