I am currently developing a project using PYNQ v3.0.1 on a Zynq-7000 SoC (XC7Z020) board. As part of the system architecture, I start a Flask server automatically during boot using a systemd service. This service executes a Python script (app.py) which initializes the PYNQ environment and loads a cu…

Did you try sourcing XRT as indicated in the other post? [image] Run python scripts in Pynq Environment Support Hi @DiogoBaptista There is three steps to running PYNQ code from the command line: Make sure you are in sudo privileges (e.g. sudo su) Source the pynq venv e…

Hi @maximilianbeutel Welcome to the PYNQ community. The service should be run as root which is where the pynq env is installed. If this still fails, you may want to source the env. See related issues: [image] Pynq z2: no module named pynq Support PYNQ is installed in …

Hello Mario, thank you for your reply. I’ve now modified the systemd service to run as root, and ensured that the pynq virtual environment is being used. However, I still encounter the following error when trying to load the overlay via Overlay(): RuntimeError: No Devices Found The error tracebac…

Yes i the xrt enviroment wasnt sourced. Thank you!

Issue with PYNQ Overlay Load Failing via systemd Service on Zynq-7000 (XC7Z020)

Support

marioruiz May 21, 2025, 2:57pm 4

Did you try sourcing XRT as indicated in the other post?

Topic		Replies	Views
RuntimeError: No Devices Found on fresh PYNQ 3.1.1 image, multiple PYNQ-Z2 boards Support	2	62	July 24, 2026
Cannot load overlays on TySOM-3-ZU7EV board using PYNQ 2.7.0 Support	3	1433	February 4, 2022
Error no device found when loading overlay Support	9	4908	June 27, 2022
PYNQ 3.0.1 can not loading Overlay: No Device Found Support	6	1715	December 6, 2022
Error loading overlay: RuntimeError: Programming Device failed: ENODEV (19) No such device Support	2	454	July 13, 2024

Issue with PYNQ Overlay Load Failing via systemd Service on Zynq-7000 (XC7Z020)

Related topics