get_timevars bug

tb.txt

TypeError                                 Traceback (most recent call last)
<ipython-input-12-6114c6ec2b0f> in <module>()
----> 1 gs.RE(ud_crab_plan(pu,19.02, 19.0, 19.00, 19.0), lt)

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/bluesky/run_engine.py in __call__(self, plan, subs, raise_if_interrupted, **metadata_kw)
    576                 exc = self._task.exception()
    577                 if exc is not None:
--> 578                     raise exc
    579             if raise_if_interrupted and self._interrupted:
    580                 raise RunEngineInterrupted("RunEngine was interrupted.")

/home/xf05id1/conda_envs/collection/lib/python3.4/asyncio/tasks.py in _step(***failed resolving arguments***)
    237                 # We use the `send` method directly, because coroutines
    238                 # don't have `__iter__` and `__next__` methods.
--> 239                 result = coro.send(None)
    240             else:
    241                 result = coro.throw(exc)

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/bluesky/run_engine.py in _run(self)
    855             self.log.error("Run aborted")
    856             self.log.error("%r", err)
--> 857             raise err
    858         finally:
    859             # call stop() on every movable object we ever set()

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/bluesky/run_engine.py in _run(self)
    827                         raise
    828                     except Exception as e:
--> 829                         msg = self._plan_stack[-1].throw(e)
    830                         self._plan_stack.append(single_gen(msg))
    831                         self._response_stack.append(None)

/nfs/xf05id1/ipython_ophyd/profile_xf05id1/startup/11-secret_undulator.py in ud_crab_plan(pu, us_u, us_l, ds_u, ds_l, other_dets)
    384         fail_time = ttime.time() + 40 * 5
    385         while not st.done:
--> 386             yield from trigger_and_read([pu] + other_dets)
    387             if ttime.time() > fail_time:
    388                 mot.stop()

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/bluesky/plans.py in wrapped(*args, **kwargs)
     68         gen_stack = func(*args, **kwargs)
     69         for g in gen_stack:
---> 70             yield from g
     71 
     72     return wrapped

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/bluesky/plans.py in single_gen(msg)
    276         the input message
    277     '''
--> 278     yield msg
    279 
    280 

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/bluesky/run_engine.py in _run(self)
    822                     try:
    823                         coro = self._command_registry[msg.command]
--> 824                         response = yield from coro(msg)
    825                         self._response_stack.append(response)
    826                     except KeyboardInterrupt:

/home/xf05id1/conda_envs/collection/lib/python3.4/asyncio/coroutines.py in coro(*args, **kw)
    204         @functools.wraps(func)
    205         def coro(*args, **kw):
--> 206             res = func(*args, **kw)
    207             if isinstance(res, futures.Future) or inspect.isgenerator(res):
    208                 res = yield from res

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/bluesky/run_engine.py in _read(self, msg)
   1120             self._config_desc_cache[obj] = obj.describe_configuration()
   1121             self._cache_config(obj)
-> 1122         ret = obj.read(*msg.args, **msg.kwargs)
   1123         self._read_cache.append(ret)
   1124         return ret

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/ophyd/device.py in read(self)
    674         """
    675         res = super().read()
--> 676         res.update(self._read_attr_list(self.read_attrs))
    677         return res
    678 

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/ophyd/device.py in _read_attr_list(self, attr_list, config)
    664                 values.update(obj.read_configuration())
    665 
--> 666             values.update(obj.read())
    667 
    668         return values

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/ophyd/device.py in read(self)
    674         """
    675         res = super().read()
--> 676         res.update(self._read_attr_list(self.read_attrs))
    677         return res
    678 

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/ophyd/device.py in _read_attr_list(self, attr_list, config)
    664                 values.update(obj.read_configuration())
    665 
--> 666             values.update(obj.read())
    667 
    668         return values

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/ophyd/utils/epics_pvs.py in wrapper(self, *args, **kwargs)
    339     def wrapper(self, *args, **kwargs):
    340         if self.connected:
--> 341             return fcn(self, *args, **kwargs)
    342         else:
    343             raise DisconnectedError('{} is not connected'.format(self.name))

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/ophyd/signal.py in read(self)
    542 
    543         return {self.name: {'value': self.value,
--> 544                             'timestamp': self.timestamp}}
    545 
    546 

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/ophyd/utils/epics_pvs.py in wrapper(self, *args, **kwargs)
    339     def wrapper(self, *args, **kwargs):
    340         if self.connected:
--> 341             return fcn(self, *args, **kwargs)
    342         else:
    343             raise DisconnectedError('{} is not connected'.format(self.name))

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/ophyd/signal.py in timestamp(self)
    423         if not self._read_pv.auto_monitor:
    424             # force updating the timestamp when not using auto monitoring
--> 425             self._read_pv.get_timevars()
    426         return self._read_pv.timestamp
    427 

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/epics/pv.py in get_timevars(self, timeout, warn)
    431         if not self.wait_for_connection():
    432             return None
--> 433         kwds = ca.get_timevars(self.chid, timeout=timeout, warn=warn)
    434         self._args.update(kwds)
    435         return kwds

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/epics/ca.py in wrapper(*args, **kwds)
    414                                                         name(chid), timeout))
    415 
--> 416         return fcn(*args, **kwds)
    417     wrapper.__doc__ = fcn.__doc__
    418     wrapper.__name__ = fcn.__name__

/home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/epics/ca.py in get_timevars(chid, timeout, warn)
   1482             return {}
   1483 
-> 1484     tmpv = ncache['time_value'][0]
   1485     for attr in ('status', 'severity'):
   1486         if hasattr(tmpv, attr):

TypeError: 'NoneType' object is not subscriptable

BlueSky [13]: %debug
> /home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/epics/ca.py(1484)get_timevars()
   1482             return {}
   1483 
-> 1484     tmpv = ncache['time_value'][0]
   1485     for attr in ('status', 'severity'):
   1486         if hasattr(tmpv, attr):

ipdb> u
> /home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/epics/ca.py(416)wrapper()
    414                                                         name(chid), timeout))
    415 
--> 416         return fcn(*args, **kwds)
    417     wrapper.__doc__ = fcn.__doc__
    418     wrapper.__name__ = fcn.__name__

ipdb> u
> /home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/epics/pv.py(433)get_timevars()
    431         if not self.wait_for_connection():
    432             return None
--> 433         kwds = ca.get_timevars(self.chid, timeout=timeout, warn=warn)
    434         self._args.update(kwds)
    435         return kwds

ipdb> u
> /home/xf05id1/conda_envs/collection/lib/python3.4/site-packages/ophyd/signal.py(425)timestamp()
    423         if not self._read_pv.auto_monitor:
    424             # force updating the timestamp when not using auto monitoring
--> 425             self._read_pv.get_timevars()
    426         return self._read_pv.timestamp
    427 

ipdb> self
EpicsSignal(read_pv='SR:C5-ID:G1{IVU21:1-Mtr:5}Sw:Go', name='pu_ds_upper_actuate', parent='pu_ds_upper', value=1, timestamp=1464876966.334643, pv_kw={}, auto_monitor=False, string=False, write_pv='SR:C5-ID:G1{IVU21:1-Mtr:5}Sw:Go', limits=False, put_complete=False)
ipdb> 

BlueSky [14]: