No devices can be found

Hello,

I am trying to use the pypylon library to enumerate the devices that are connected via Ethernet. However, when I call the following code, the tlFactory.EnumerateDevices() call is an empty tuple and the line to create the device fails with an exception. I’ve copied the code and the result below. Pylon sees 10 cameras connected.

from pypylon import pylon
from pypylon import genicam

tlFactory = pylon.TlFactory.GetInstance()
devices = tlFactory.EnumerateDevices()
print(f"devices: {devices}")
camera = pylon.InstantCamera(pylon.TlFactory.GetInstance().CreateFirstDevice())

devices: ()
Traceback (most recent call last):
  File "C:\python_issue.py", line 7, in <module>
    camera = pylon.InstantCamera(pylon.TlFactory.GetInstance().CreateFirstDevice())
  File "C:\Users\USER\AppData\Local\Programs\Python\Python39\lib\site-packages\pypylon\pylon.py", line 1582, in CreateFirstDevice
    return _pylon.TlFactory_CreateFirstDevice(self, *args)
_genicam.RuntimeException: No device is available or no device contains the provided device info properties. : RuntimeException thrown (file 'tlfactory.cpp', line 694)

Is there something else I need to do to let pypylon know that the devices are connected via Ethernet? The only way this code works is if I set an environment variable to run with emulated devices. No real devices are ever seen.

Thank you!

Environment Setup

Windows 10 Python 3.9.5 pypylon 1.7.2

[milancurcic]

Same problem here. I have a GigE camera (acA2500-20gm) configured on the same subnet as the host. I can connect to it from Pylon Viewer, and I can ping it from the command line. However, tl_factory.EnumerateDevices() keeps returning an empty tuple.

@thiesmoeller, how do you recommend to best diagnose this? I’m using the pypylon from the latest commit on the master branch.

Thank you!

[ghazalehtrb]

Hi @ghazalehtrb,

in the setup you describe it shouldn’t be required to use this special procedure to open a camera by it’s IP address. Or has your PC multiple network interfaces which run in LLA mode? ( LLA == network 169.254.x.x)

Have you followed the documentation for installing on gige? https://docs.baslerweb.com/network-configuration-(gige-cameras)

Thank you. I repeated the configuration process and it seems to be working now. (don’t know what was wrong before!)