T265: Attempt to save a map very often ends in "null pointer passed for argument "buffer""

[neilyoung]

Required Info
Camera Model	T265
Firmware Version	0.2.0.908
Operating System & Version	ubuntu 16.04.6 LTS
Kernel Version (Linux Only)
Platform
SDK Version	2.32.0, development, 95cbea5
Language
Segment	others

Issue Description

As subject says: What could be the reason for this problem? Comes out of the sudden. I can already have saved the map a couple of times successfully. It can be, that this situation is solved by re-starting. The map is not even corrupted and accepted on load. But there were also cases, in which I had to replug the cam in order to recover from that, IMHO an absolute NOGO for productive scenarios.

[radfordi]

@neilyoung, please let if know if #5687 addresses this issue. Thinking more about what you wrote, I don't think it will address it. I'll see if I can reproduce this issue.

[neilyoung]

Thanks Jim. This is what I wanted to comment. I have this pretty often, too often, to be honest, to be not concerned while pressing the "Save" button.

Most of the times this is accompanied by a second attempt, which seem to work, but then either stop or a new start does not work and the stack claims "no device connected". The common solution is to power-cycle the cam (not a solution of course :))

[radfordi]

We have been able to reproduce this. Thanks for the report, @neilyoung.

[neilyoung]

Oh great. Thanks for confirmation.

[neilyoung]

closed for lack of interest

[neilyoung]

2020-12-06 23:07:35,936 pose_pose.py INFO    : SDK: 2.39.0
2020-12-06 23:07:35,936 pose_pose.py INFO    : Firmware: 0.2.0.951
2020-12-06 23:07:35,936 pose_pose.py INFO    : USB: 3.1

But still present