Exception in send_frame(): Internal error occured.

brentr

In testing our C++ application on the RCV4-DEV-KIT, I get these depthAI errors:

[1529331665] [169.254.30.50] [13973.844] [Camera(0)] [error] Exception in send_frame(): Internal error occured. Please report. commit: | version: 0.0.1 | file: /work/src/camera/CameraSensor.cpp:92

[1529331665] [169.254.30.50] [13973.850] [Camera(3)] [error] Exception in send_frame(): Internal error occured. Please report. commit: | version: 0.0.1 | file: /work/src/camera/CameraSensor.cpp:92

[1529331665] [169.254.30.50] [13974.256] [Camera(0)] [error] Exception in send_frame(): Internal error occured. Please report. commit: | version: 0.0.1 | file: /work/src/camera/CameraSensor.cpp:92

[1529331665] [169.254.30.50] [13974.257] [Camera(0)] [error] Exception in send_frame(): Internal error occured. Please report. commit: | version: 0.0.1 | file: /work/src/camera/CameraSensor.cpp:92

[2026-05-18 14:13:42.025] [depthai] [error] Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_3_0' (X_LINK_ERROR)'

[2026-05-18 14:13:42.025] [depthai] [error] Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_9_out' (X_LINK_ERROR)'

[2026-05-18 14:13:42.025] [depthai] [error] Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_0_0' (X_LINK_ERROR)'[2026-05-18 14:13:47.198] [ThreadedNode] [error] Node threw exception, stopping the node. Exception message: Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_3_0' (X_LINK_ERROR)'

[2026-05-18 14:13:47.198] [ThreadedNode] [error] Node threw exception, stopping the node. Exception message: Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_0_0' (X_LINK_ERROR)'

[2026-05-18 14:13:48.214] [warning] FW crashed - trying to get out the crash dump

[2026-05-18 14:13:51.214] [warning] Getting the crash dump out - this can take up to a minute, because it first needs to be compressed.

[2026-05-18 14:13:51.301] [depthai] [error] Device with id 1529331665 has crashed. Crash dump logs are stored in: /home/brent/git/sen_oakd_lcm_cpp/build/.cache/depthai/crashdumps/8e1dd7359d306b5eeb522edb9bc3aa4f20f765a5/core_dump_0.0.1+bf5ff19d2bd72349754e001854e972bc9d379dd1_19691231_195303.tar.gz - please report to developers.

This message board does not allow uploading files.

How shall I send you the core_dump?

OskarSonc

brentr - with which cameras was this used? Can you tell a bit more?
You can upload the core_dump_...tar.gz to an external file-sharing service (for example Google Drive / Dropbox / WeTransfer) and share the link here or I can share my email...

Best,
Oskar

brentr

You can find the crash dump at:

The cameras in use were OV9282

I tried once with two sensors and again with just one. Same crash each time.

Using depthai-core 3.5.0 compiled from source on a Debian 13 system.

OskarSonc

brentr - could you also share a script or at least the minimal working example?

Thanks,
Oskar

brentr

Unfortunately, this crash is generated by a our (mid-sized) C++ app.

Is there anything you can tell me from examining the crash dump that might help me to create a simpler test case that triggers the failure?

For example, more info about the send_frame() exceptions, perhaps?

OskarSonc

brentr - I see. I checked the dump and found few useful things.
The send_frame() exceptions do not look like the root cause. They appear after the camera stack has already started failing.

The earlier signs in the dump point more toward a camera-stack / sync issue:

repeated GBM_ERR ... failed to import gem_handle for Metadata
CamxResultExtCoreInvalidReqAccess
repeated CAM-SYNC errors about uninitialized sync objects

One more important detail: the dump shows the multicamera/sync path is enabled:

multiCameraEnable = 1
multiCameraFrameSync = 1
multiCameraLogicalXMLFile = luxonis_generic_multicam.xml

So the best next step would be to simplify toward:

one OV9282, one plain preview/output stream
then two OV9282 streams
then re-enable any camera grouping/sync logic

Thanks,
Oskar