# Pipe Overflow Error

Source: https://forum.modalai.com/topic/3435/pipe-overflow-error
Category: VOXL SDK and Software (https://forum.modalai.com/category/47/voxl-sdk-and-software)
Tags: mpa
Posted: 2024-05-14 20:13:14 UTC by Jeffrey Mao
Replies: 5 · Views: 3679

## Jeffrey Mao · 2024-05-14 20:13:14 UTC

Currently, I am using the voxl_mpa_to_ros2 repository. Do you have any idea what causes the following error

ERROR: invalid metadata, magic number=0, expected 1448040524
most likely client fell behind and pipe overflowed

This only happens when I try streaming the depth_image through the piep> There is no problem with lowbandwith data like imu_app/qvio odometry. Do you know what the root cause is for this or if there is a way to solve this in ROS2?

Thanks,

Jeff

## Reply by Alex Kushleyev (ModalAI staff) · 2024-05-15 14:22:56 UTC

@Jeffrey-Mao , does this happen occasionally (how often) or very frequently (every frame?)

## Reply by Jeffrey Mao · 2024-05-15 18:54:39 UTC

This happens if we leave the pipe on while streaming depth_images from stereo_disparity for a minute or two. After which it happens very frequently.

## Reply by Alex Kushleyev (ModalAI staff) · 2024-05-15 20:38:16 UTC (in reply to Jeffrey Mao)

@Jeffrey-Mao , `depth_image` is just a regular image, correct (not a 3D point cloud)? What is publishing this image?

## Reply by Jeffrey Mao · 2024-05-16 15:09:05 UTC (in reply to Alex Kushleyev)

@Alex-Kushleyev Sorry for the confusion I mean Disparity Image.

 On further examination, I think this is a network problem. When streaming high bandwith objects like Disparity images or images in general across wifi. I think effectively managing the bandwidth can alleviate this problem.

## Reply by Alex Kushleyev (ModalAI staff) · 2024-05-16 19:34:35 UTC (in reply to Jeffrey Mao)

@Jeffrey-Mao , no worries, thanks for the update!