New server gives error #100
Description
Upon instantiating my instrument I get an error
command:
Wines("Wines", server_name='')
Error is posted below.
When I run the same command again, it suddenly works.
I have the feeling that qcodes tries to connect to the new instrument server before it is fully instantiated. I guess some timeout needs to be set, such that the first connect is allowed to take a little bit of time.
in server.py
def connect(self, remote_instrument, instrument_class, args, kwargs):
new_id = self.ask('new_id') # <--add some timeout here
Else I would not know what the problem is, anyone else experiencing the same problem?
error traceback:
---------------------------------------------------------------------------
Empty Traceback (most recent call last)
<ipython-input-3-3d79c9947757> in <module>()
1 print("define wines instrument")
----> 2 simulation = wines.wire_network.WireNetwork("Wines", server_name='')
c:\users\t-dadejo\pycharm_projects\qcodes\qcodes\instrument\base.py in __new__(cls, server_name, *args, **kwargs)
61 else:
62 return RemoteInstrument(*args, instrument_class=cls,
---> 63 server_name=server_name, **kwargs)
64
65 def __init__(self, name, server_name=None, **kwargs):
c:\users\t-dadejo\pycharm_projects\qcodes\qcodes\instrument\remote.py in __init__(self, instrument_class, server_name, *args, **kwargs)
25 manager = get_instrument_server(server_name, shared_kwargs)
26 # connect sets self.connection
---> 27 manager.connect(self, instrument_class, args, kwargs)
28
29 # bind all the different categories of actions we need
c:\users\t-dadejo\pycharm_projects\qcodes\qcodes\instrument\server.py in connect(self, remote_instrument, instrument_class, args, kwargs)
78
79 def connect(self, remote_instrument, instrument_class, args, kwargs):
---> 80 new_id = self.ask('new_id')
81 try:
82 conn = InstrumentConnection(
c:\users\t-dadejo\pycharm_projects\qcodes\qcodes\utils\multiprocessing.py in ask(self, timeout, *query)
332 if self._error_queue.empty():
333 # only raise if we're not about to find a deeper error
--> 334 raise e
335 self._check_for_errors(self._expect_error)
336
c:\users\t-dadejo\pycharm_projects\qcodes\qcodes\utils\multiprocessing.py in ask(self, timeout, *query)
324
325 try:
--> 326 res = self._check_response(timeout)
327
328 while not self._response_queue.empty():
c:\users\t-dadejo\pycharm_projects\qcodes\qcodes\utils\multiprocessing.py in _check_response(self, timeout)
301
302 def _check_response(self, timeout):
--> 303 res = self._response_queue.get(timeout=timeout)
304 if res == SERVER_ERR:
305 self._expect_error = True
C:\Users\t-dadejo\AppData\Local\Continuum\Anaconda3\envs\santabarbara\lib\multiprocessing\queues.py in get(self, block, timeout)
103 timeout = deadline - time.time()
104 if timeout < 0 or not self._poll(timeout):
--> 105 raise Empty
106 elif not self._poll():
107 raise Empty
Empty: