error packet at line 840?

[shltch at osfmail.isc.rit.edu]

I'm trying to log into a Samba server, but I get this error:

[1999/06/02 11:24:51, 4] passdb/pass_check.c:(792)
  Checking password for user shltch (l=10)
[1999/06/02 11:24:51, 3] smbd/error.c:(133)
  error packet at line 840 cmd=115 (SMBsesssetupX) eclass=2 ecode=2
[1999/06/02 11:24:51, 3] smbd/error.c:(143)
  error string = Invalid argument
[1999/06/02 11:24:51, 5] lib/util.c:(452)
  size=35
  smb_com=0x73
  smb_rcls=2
  smb_reh=0
  smb_err=2
  smb_flg=136
  smb_flg2=1
[1999/06/02 11:24:51, 5] lib/util.c:(460)
  smb_tid=0
  smb_pid=2360
  smb_uid=0
  smb_mid=1
  smt_wct=0

Does anyone know what this error message means or could mean?

Some info about my installation:
- DEC UNIX 4.0
- ran with ./configure --with-dfs
- I'm using smbclient on the same machine to do this test (more
specifically, test 7 from the diagnosis.txt file)
- I have also tried giving the username/password at the command line w/
this -U option

Thanks for any help or pointers,
Seth

shltch at osfmail.isc.rit.edu