Cannot stop database



I get an error message when I try to stop the database:

scidb@ubuntu:~$ stopall test1
stop(server 0 (localhost) local instance 0)
ssh failure:  No authentication methods available
Traceback (most recent call last):
  File "/opt/scidb/12.3/bin/", line 820, in <module>
  File "/opt/scidb/12.3/bin/", line 669, in stopAll
  File "/opt/scidb/12.3/bin/", line 748, in stop
    executeIt(cmdList, srv, liid, useConnstr=False, useSSH4Local=True, nocwd=True)
  File "/opt/scidb/12.3/bin/", line 334, in executeIt
    sshc = sshconnect(srv, liid)
  File "/opt/scidb/12.3/bin/", line 269, in sshconnect
    raise s
paramiko.SSHException: No authentication methods available

I found this bug report, but I am not sure if it is the same issue or if it applies to my version. I am running SciDB v12.3 on Ubuntu 11.10.

Any insight appreciated, thank you.