I'm using the revision control image installed on a physical machine, and it's been working fine for quite some time (uptime was at 168 days this morning).  I noticed that the last backup time was last Thursday.  I started by rebooting the server, and then I tried starting a backup manually and got this error: 

File "/usr/bin/tklbam-backup", line 513, in <module> 
main() 
File "/usr/bin/tklbam-backup", line 446, in main 
opt_resume, True, dump_path if dump_path else "/") 
File "/usr/lib/tklbam/backup.py", line 218, in __init__ 
saved_backup_conf = BackupConf.fromfile(extras_paths.backup_conf) 
File "/usr/lib/tklbam/backup.py", line 76, in fromfile 
d = simplejson.load(file(path)) 
File "/usr/lib/pymodules/python2.6/simplejson/__init__.py", line 328, in load 
use_decimal=use_decimal, **kw) 
File "/usr/lib/pymodules/python2.6/simplejson/__init__.py", line 384, in loads 
return _default_decoder.decode(s) 
File "/usr/lib/pymodules/python2.6/simplejson/decoder.py", line 402, in decode 
obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
File "/usr/lib/pymodules/python2.6/simplejson/decoder.py", line 420, in raw_decode 
raise JSONDecodeError("No JSON object could be decoded", s, idx) 
simplejson.decoder.JSONDecodeError: No JSON object could be decoded: line 1 column 0 (char 0) 

After searching the forums, I have tried:

  apt-get update && apt-get install tklbam => already on latest version

  rm /var/lib/tklbam/backup-resume

  try backup again => same error

  rm -rf /var/lib/tklbam

  tklbam-init

  try backup again => same error.

Server is running with 3 GB of memory and this is all it's doing; any suggestions?

Thanks in advance