A problem occurred while running a Python script. Here is the sequence of function calls leading up to the error, with the most recent (innermost) call first. The exception attributes are:
      __doc__ = 'Attribute not found.'
      __getitem__ = <bound method AttributeError.__getitem__ of <exceptions.AttributeError instance>>
      __init__ = <bound method AttributeError.__init__ of <exceptions.AttributeError instance>>
      __module__ = 'exceptions'
      __str__ = <bound method AttributeError.__str__ of <exceptions.AttributeError instance>>
      args = ("'str' object has no attribute 'sign'",)

/usr/lib/python2.2/site-packages/roundup/date.py in __cmp__(self=<Interval + 3:55>, other='+ 3:55')

  425             return 1
  426         for attr in 'sign year month day hour minute second'.split():

427             r = cmp(getattr(self, attr), getattr(other, attr))

      r = undefined, global cmp = undefined, global getattr = undefined, self = <Interval + 3:55>, attr = 'sign', other = '+ 3:55'
  428             if r:
  429                 return r

/usr/lib/python2.2/site-packages/roundup/backends/back_anydbm.py in set(self=<hyperdb.Class "timelog">, nodeid='10', **propvalues={'period': '+ 3:55'})

 1174             # doing anything
 1175             current = node.get(propname, None)

1176             if value == current:

      value = '+ 3:55', current = <Interval + 3:55>
 1177                 del propvalues[propname]
 1178                 continue

/usr/lib/python2.2/site-packages/roundup/cgi/client.py in editCSVAction(self=<_roundup_tracker_1.interfaces.Client instance>)

 1257             if exists:
 1258                 # edit existing

1259                 cl.set(nodeid, **d)

      cl = <hyperdb.Class "timelog">, global set = undefined, nodeid = '10', d = {'period': '+ 3:55'}
 1260             else:
 1261                 # new node

/usr/lib/python2.2/site-packages/roundup/cgi/client.py in handle_action(self=<_roundup_tracker_1.interfaces.Client instance>)

  534                 raise ValueError, 'No such action "%s"'%action
  535             # call the mapped action

536             getattr(self, method)()

      global getattr = undefined, self = <_roundup_tracker_1.interfaces.Client instance>, method = 'editCSVAction'
  537         except Redirect:
  538             raise

/usr/lib/python2.2/site-packages/roundup/cgi/client.py in inner_main(self=<_roundup_tracker_1.interfaces.Client instance>)

  264         except:
  265             # everything else

266             self.write(cgitb.html())

      self = <_roundup_tracker_1.interfaces.Client instance>, global write = undefined, global cgitb = <module 'roundup.cgi.cgitb' from '/usr/lib/python2.2/site-packages/roundup/cgi/cgitb.py'>, global html = undefined
  267 
  268     def clean_sessions(self):