# Error running embedded devices

**URL:** <https://discuss.flower.ai/t/error-running-embedded-devices/993>\
**Category:** Flower Help - Beginners\
**Created:** [June 4, 2025, 2:13pm UTC](https://discuss.flower.ai/t/error-running-embedded-devices/993 "2025-06-04T14:13:44Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![raul3497](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@raul3497](https://discuss.flower.ai/u/raul3497)\
**Post date:** [June 4, 2025, 2:13pm UTC](https://discuss.flower.ai/t/error-running-embedded-devices/993/1 "2025-06-04T14:13:44Z")

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Hi I was trying to run [this example](https://github.com/adap/flower/tree/main/examples/embedded-devices) on a laptop with the superlink and a super node on it and the other node in a raspberry pi 3B+  
The client running on the laptop works well and the other one in the raspi same but when I launch flwr run . embedded-federation the training on the client in raspi launch this error:

ERROR : ClientApp raised an exception  
Traceback (most recent call last):  
File “/home/user/.pyenv/versions/3.11.2/envs/my-env/lib/python3.11/site-packages/flwr/client/app.py”, line 562, in start\_client\_internal  
outputs = clientappio\_servicer.get\_outputs()  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File “/home/user/.pyenv/versions/3.11.2/envs/my-env/lib/python3.11/site-packages/flwr/client/clientapp/clientappio\_servicer.py”, line 235, in get\_outputs  
raise ValueError(“ClientAppOutputs not set before calling `get_outputs`.”)  
ValueError: ClientAppOutputs not set before calling `get_outputs`.

Anyone can help me with this.  
Thank you.  
Best.

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**Author:** ![javier](https://dub1.discourse-cdn.com/flex013/user_avatar/discuss.flower.ai/javier/32/116_2.png) [@javier](https://discuss.flower.ai/u/javier)\
**Post date:** [June 7, 2025, 1:52pm UTC](https://discuss.flower.ai/t/error-running-embedded-devices/993/2 "2025-06-07T13:52:35Z")

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Hi @raul3497,

I can think of two reasons why this might happen:

1. Have you installed all the dependencies on your RapsberryPi? (e.g. for example your `ClientApp` might need PyTorch, then you should install it in your RPi env).
2. It could be that the RaspberryPi is running out of memory and crash. Have you observed high RAM utilization when you run your `SuperNode` on the RPi?

Finally, is the error log you included in your post the complete error trace?

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<div class="post-metadata">

**Author:** ![raul3497](https://avatars.discourse-cdn.com/v4/letter/r/e9bcb4/32.png) [@raul3497](https://discuss.flower.ai/u/raul3497)\
**Post date:** [June 9, 2025, 10:07pm UTC](https://discuss.flower.ai/t/error-running-embedded-devices/993/3 "2025-06-09T22:07:04Z")

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Hi Javier, I retried all the example I installed the dependencies and checked the RAM usage but I’m getting the same error.  
I’m attaching the capture.  
Thank you.  
Best.

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/flower/original/1X/4a827a9f2a54c60b9eb2e496f1984b39aedab93e.png)