jigsaw failure Unable to load dll 'Unix.dll' (errcode = 485)

Could some tell me what this means?

C:\Jigsaw\Jigsaw>java w3c.jigsaw.Main -host linux.thecb.state.tx.us -root c:\jigsaw\jigsaw
loading properties from: c:\jigsaw\jigsaw\config\server.props
Jigsaw[1.0alpha5]: serving at http://linux.thecb.state.tx.us:8001/
Unable to load dll 'Unix.dll' (errcode = 485)


 Johnny W.  Long
personal email:  LongJy@io.com  web: http://www.io.com/~longjy
work email: LongJy@thecb.state.tx.us web: http://www.thecb.state.tx.us

Received on Thursday, 3 April 1997 18:50:32 UTC