Grab failed. Code: 3791651074 Description: The buffer was cancelled.

[Satge96]

Describe what you want to implement and what the issue & the steps to reproduce it are:

import warnings

from pypylon import pylon

def main():
    print("Hello from basler-camera-problems!")
    tlf = pylon.TlFactory.GetInstance()
    devices = tlf.EnumerateDevices()
    n_cameras = len(devices)
    camera_array = pylon.InstantCameraArray(n_cameras)

    camera_indices = [0, 1]
    for idx, (camera_idx, camera) in enumerate(zip(camera_indices, camera_array)):
        camera.Attach(tlf.CreateDevice(devices[idx]))
        camera.SetCameraContext(camera_idx)
    camera_array.Open()
    for cam in camera_array:
        cam.AcquisitionFrameRateEnable.SetValue(True)
        cam.AcquisitionFrameRate.SetValue(20)
        cam.TriggerSelector.SetValue("FrameStart")
        cam.TriggerMode.SetValue("Off")
        cam.AcquisitionMode.SetValue("Continuous")
        cam.Width.SetValue(cam.SensorWidth.GetValue())
        cam.Height.SetValue(cam.SensorHeight.GetValue())
        cam.OffsetX.SetValue(0)
        cam.OffsetY.SetValue(0)
        cam.ReverseX.SetValue(False)
        cam.ReverseY.SetValue(False)

    camera_array.StartGrabbing(
        pylon.GrabStrategy_OneByOne, pylon.GrabLoop_ProvidedByUser
    )
    while True:
        with camera_array.RetrieveResult(
            5000, pylon.TimeoutHandling_ThrowException
        ) as grab_result:
            if grab_result.GrabSucceeded():
                if pylon.PayloadType_Image != grab_result.PayloadType:
                    warnings.warn("Unexpected payload type received")
                    continue
                camera_idx = grab_result.GetCameraContext()
                frame_counter = grab_result.ImageNumber
                grab_result.Release()
            else:
                msg = f" Grab failed. Code: {grab_result.GetErrorCode()}"
                msg += f" Description: {grab_result.GetErrorDescription()}"
                print(msg)


if __name__ == "__main__":
    main()

After a while, the code above results in the following:
Grab failed. Code: 3791651074 Description: The buffer was cancelled.
(A while being around 30min)

Is your camera operational in Basler pylon viewer on your platform

No

Hardware setup used

X86_64
Ubuntu 24.04.1 LTS
32.0 GiB RAM

Camera(s) used

Two a2A4200 - 40umBAS

Runtime information:

python: 3.11.11 (main, Dec  4 2024, 08:55:08) [GCC 13.2.0]
platform: linux/x86_64/6.8.0-51-generic
pypylon: 4.1.0 / 9.0.3.215

[thiesmoeller]

First comment:
You do a double free of the grab result.

The with... Handler will automatically release on exit of the context

[Satge96]

That seemed to fx my problem in the minimal project. I will try it in the bigger one.