<class 'twisted.spread.pb.DeadReferenceError'>: Calling Stale Broker

/usr/lib/python2.5/site-packages/twisted/internet/defer.py, line 106 in maybeDeferred
104
105  try:
106    result = f(*args, **kw)
107  except:
Locals
args'()'
kw'{}'
f"<bound method RemoteShellCommand.start of <RemoteShellCommand '['tools\\\\buildbot\\\\symstore.pl']'>>"
/usr/lib/python2.5/site-packages/buildbot/process/buildstep.py, line 503 in start
501                       self.args['workdir'])
502    log.msg(what)
503    return LoggedRemoteCommand.start(self)
504
Locals
what'"command \'[\'tools\\\\\\\\buildbot\\\\\\\\symstore.pl\']\' in dir \'build\'"'
self"<RemoteShellCommand '['tools\\\\buildbot\\\\symstore.pl']'>"
Globals
LoggedRemoteCommand'<class buildbot.process.buildstep.LoggedRemoteCommand at 0x8412bfc>'
log"<module 'twisted.python.log' from '/usr/lib/python2.5/site-packages/twisted/python/log.pyc'>"
/usr/lib/python2.5/site-packages/buildbot/process/buildstep.py, line 303 in start
301          % self)
302    self.updates = {}
303    return RemoteCommand.start(self)
304
Locals
self"<RemoteShellCommand '['tools\\\\buildbot\\\\symstore.pl']'>"
Globals
RemoteCommand'<class buildbot.process.buildstep.RemoteCommand at 0x8412bcc>'
/usr/lib/python2.5/site-packages/buildbot/process/buildstep.py, line 111 in start
109    # We should fire self.deferred when the command is done.
110    d = self.remote.callRemote("startCommand", self, self.commandID,
111                  self.remote_command, self.args)
112    return d
Locals
self"<RemoteShellCommand '['tools\\\\buildbot\\\\symstore.pl']'>"
/usr/lib/python2.5/site-packages/twisted/spread/pb.py, line 340 in callRemote
338
339    return self.broker._sendMessage('',self.perspective, self.luid,
340                    _name, args, kw)
341
Locals
self'<twisted.spread.pb.RemoteReference instance at 0x86dcd2c>'
args"(<RemoteShellCommand '['tools\\\\buildbot\\\\symstore.pl']'>, '117', 'shell', {'workdir': 'build', 'env': None, 'want_stderr': 1, 'logfiles': {}, 'command': ['tools\\\\buildbot\\\\symstore.pl'], 'timeout': 1200, 'want_stdout': 1, 'usePTY': 'slave-config', 'dir': 'build'})"
kw'{}'
_name"'startCommand'"
/usr/lib/python2.5/site-packages/twisted/spread/pb.py, line 818 in _sendMessage
816      del kw['pbanswer']
817    if self.disconnected:
818      raise DeadReferenceError("Calling Stale Broker")
819    try:
Locals
self'<twisted.spread.pb.Broker instance at 0x86f3d0c>'
kw'{}'
Globals
Broker'<class twisted.spread.pb.Broker at 0xb770ca4c>'
DeadReferenceError"<class 'twisted.spread.pb.DeadReferenceError'>"

<class 'twisted.spread.pb.DeadReferenceError'>: Calling Stale Broker