(...) 6180.dat was one of the original LDraw parts -- it should already be on your system. You can also grab a copy from (URL) (right-click the link and choose "Save Target As") Steve (24 years ago, 15-Mar-01, to lugnet.cad.dat.parts)
(...) Hmm. Try rerunning mklist.exe. In MLCAD, do a "scan parts". Other than that, I can't think of why the part isn't shown in the list. Steve (24 years ago, 16-Mar-01, to lugnet.cad.dat.parts)