# Error when trying to create a strawberryfields.tf device **URL:** \ **Category:** PennyLane Strawberry Fields\ **Created:** [May 10, 2021, 2:21am UTC](https://discuss.pennylane.ai/t/error-when-trying-to-create-a-strawberryfields-tf-device/1027 "2021-05-10T02:21:57Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Denis-Stanev](https://avatars.discourse-cdn.com/v4/letter/d/6f9a4e/32.png) [@Denis-Stanev](https://discuss.pennylane.ai/u/Denis-Stanev)\ **Post date:** [May 10, 2021, 2:21am UTC](https://discuss.pennylane.ai/t/error-when-trying-to-create-a-strawberryfields-tf-device/1027/1 "2021-05-10T02:21:57Z")
When I try to run the following piece of code: `dev = qml.device('strawberryfields.tf', wires=6, cutoff_dim=3)` I get the error: ``` --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) in ----> 1 dev = qml.device('strawberryfields.tf', wires=6, cutoff_dim=3) C:\ProgramData\Anaconda3\envs\Pennylane14TF\lib\site-packages\pennylane\ __init__.py in device(name, *args, **kwargs) 251 252 # load device --> 253 return plugin_device_class(*args, **options) 254 255 raise DeviceError("Device does not exist. Make sure the required plugin is installed.") C:\ProgramData\Anaconda3\envs\Pennylane14TF\lib\site-packages\pennylane_sf\tf.py in __init__ (self, wires, cutoff_dim, analytic, shots, hbar) 191 192 def __init__ (self, wires, *, cutoff_dim, analytic=True, shots=1000, hbar=2): --> 193 super(). __init__ (wires, analytic=analytic, shots=shots, hbar=hbar) 194 self.cutoff = cutoff_dim 195 self.params = dict() C:\ProgramData\Anaconda3\envs\Pennylane14TF\lib\site-packages\pennylane_sf\simulator.py in __init__ (self, wires, analytic, shots, hbar) 82 self.state = None 83 self.samples = None ---> 84 self.analytic = analytic 85 86 def execution_context(self): AttributeError: can't set attribute ``` This code worked fine with Pennylane v0.13.0, but in the new version of Pennylane (v0.15.1) it gives the error I reported above. Do I need to change the parameters I pass to the qml.device function, or is it a bug? ---
**Author:** ![Maria\_Schuld](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/maria_schuld/32/166_2.png) [@Maria\_Schuld](https://discuss.pennylane.ai/u/Maria_Schuld)\ **Post date:** [May 10, 2021, 6:00am UTC](https://discuss.pennylane.ai/t/error-when-trying-to-create-a-strawberryfields-tf-device/1027/2 "2021-05-10T06:00:54Z")
Hey @Denis-Stanev, The error seems to be caused by a the new logic of how `shots` is used to define whether a device is analytic or not (see [here](https://pennylane.readthedocs.io/en/stable/development/release_notes.html) under " Devices do not have an `analytic` argument or attribute anymore.") Are you sure you have the latest version of the StrawberryFields plugin installed? Could you post the output of `qml.about()` (after importing pennylane as `qml`)? ---
**Author:** ![Denis-Stanev](https://avatars.discourse-cdn.com/v4/letter/d/6f9a4e/32.png) [@Denis-Stanev](https://discuss.pennylane.ai/u/Denis-Stanev)\ **Post date:** [May 10, 2021, 3:38pm UTC](https://discuss.pennylane.ai/t/error-when-trying-to-create-a-strawberryfields-tf-device/1027/3 "2021-05-10T15:38:47Z")
I had version 0.14 of the pennylane-sf plugin installed. I have now updated to version 0.15 and it seems to work now. Thank you for your help. ---
**Author:** ![Maria\_Schuld](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/maria_schuld/32/166_2.png) [@Maria\_Schuld](https://discuss.pennylane.ai/u/Maria_Schuld)\ **Post date:** [May 11, 2021, 12:00pm UTC](https://discuss.pennylane.ai/t/error-when-trying-to-create-a-strawberryfields-tf-device/1027/4 "2021-05-11T12:00:20Z")
Great, happy to hear you sorted it out!