is WorldAnchorTransferBatch broken in 5.5.0b11?

Target Platforms XR
1

I’m using WorldAnchorTransferBatch to serialize WorldAnchors which is working great in the HoloLens Emulator. Once I use it on the actual HoloLens hardware it fails every time with the error “Failed to world lock serialization failed”. Here is the code that causes the error.

            var worldAnchorBatch = new WorldAnchorTransferBatch();
            worldAnchorBatch.AddWorldAnchor(AnchorName, anchor);
            WorldAnchorTransferBatch.ExportAsync(worldAnchorBatch, WriteBuffer, ExportComplete);

My questions are:

  • Is this broken or am I doing something wrong?
  • If it is broken in Unity, any idea when it will be fixed?

I’ve been banging my head against the wall for days, so any help is appreciated!

2

Can you submit a bug with a project that repro’s what you are seeing please so we can investigate the issue?

3

Thank you for the reply. I have created a bug with an attached repro. I’m looking forward to any info you can give me.
This is Case 854173.

4

This issue still exists in the released 5.5, there has been nothing posted or added to my bug and I can’t modify to add that new information. Any idea when this will at least be triaged? 2 or the 3 HoloLens Apps I’m working on are stuck because of this bug…

5

I am getting the same error with Unity 5.5.0f3 and 5.6.0b1 . Was the problem coming from Unity or was it something with your code?

6

I got feedback on my bug from Unity QA saying that my example works fine for them. They asked me to refine the example I have even smaller for them to review, which I will do today. So no idea where the actual issue is… I know there is another person I’m talking to on Stack Overflow with the same problem as well. My guess is its a unity issue based on three of us with the same problem, but who knows… I’ll keep this thread updated if I find out more.

7

I’ve submitted a new repro to Wesley, he was unable to reproduce this, which is a bit concerning.

1 Like
8

Could that be related to the device then. If I delete the spatial information from the hololens, I seem to get data to export but then the export fail. After a time I am just back to the error: “Failed to world lock serialization failed”