[rdiff-backup-users] Assertion Error

[Jim St.Cyr]

I received the below error while performing a backup.  Everything was
running fine up until this point.  Any assistance in interpreting what
is going on would be appreciated.

Jim

Exception '' raised of class 'exceptions.AssertionError':
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/Main.py",
line 295, in error_check_Main
    try: Main(arglist)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/Main.py",
line 315, in Main
    take_action(rps)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/Main.py",
line 271, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/Main.py",
line 334, in Backup
    backup.Mirror_and_increment(rpin, rpout, incdir)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/backup.py",
line 51, in Mirror_and_increment
    DestS.patch_and_increment(dest_rpath, source_diffiter, inc_rpath)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/backup.py",
line 229, in patch_and_increment
    ITR(diff.index, diff)
  File
"/usr/local/lib/python2.4/site-packages/rdiff_backup/rorpiter.py", line
284, in __call__
    branch.start_process(*args)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/backup.py",
line 682, in start_process
    assert diff_rorp.isdir() or self.base_rp.isdir()

Traceback (most recent call last):
  File "/usr/local/bin/rdiff-backup", line 23, in ?
    rdiff_backup.Main.error_check_Main(sys.argv[1:])
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/Main.py",
line 295, in error_check_Main
    try: Main(arglist)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/Main.py",
line 315, in Main
    take_action(rps)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/Main.py",
line 271, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/Main.py",
line 334, in Backup
    backup.Mirror_and_increment(rpin, rpout, incdir)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/backup.py",
line 51, in Mirror_and_increment
    DestS.patch_and_increment(dest_rpath, source_diffiter, inc_rpath)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/backup.py",
line 229, in patch_and_increment
    ITR(diff.index, diff)
  File
"/usr/local/lib/python2.4/site-packages/rdiff_backup/rorpiter.py", line
284, in __call__
    branch.start_process(*args)
  File "/usr/local/lib/python2.4/site-packages/rdiff_backup/backup.py",
line 682, in start_process
    assert diff_rorp.isdir() or self.base_rp.isdir()
AssertionError