# API Failed - Not Implemented

**URL:** <https://forum.magicleap.cloud/t/api-failed-not-implemented/1523>\
**Category:** Unity Development\
**Tags:** development, unity\
**Created:** [February 23, 2023, 9:42pm UTC](https://forum.magicleap.cloud/t/api-failed-not-implemented/1523 "2023-02-23T21:42:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nathan](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.magicleap.cloud/nathan/32/674_2.png) [@nathan](https://forum.magicleap.cloud/u/nathan)\
**Post date:** [February 23, 2023, 9:42pm UTC](https://forum.magicleap.cloud/t/api-failed-not-implemented/1523/1 "2023-02-23T21:42:24Z")

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I'm getting a few errors all referring to the same thing when launching the MagicLeap\_Examples. Specifically when I'm running the WebRTC scene. I get multiple errors regarding MLResult NotImplemented.

From what I gathered it seems to happen when calling MLWebRTC.Instance. A lot of this is new to me, but I'm slowly delving deeper into the code.

Currently using the App Sim to test since I'm waiting on the ML 2 to arrive.

**Unity Editor version** : 2022.2.7f1  
**MLSDK version** : 1.4.0

Error: MLWebRTCInstanceCreateWithDebugUtils in the Magic Leap API failed. Reason: MLResult\_NotImplemented  
UnityEngine.XR.MagicLeap.MLWebRTC/VideoSink:Create (UnityEngine.XR.MagicLeap.MLResult&)  
MagicLeap.Core.MLWebRTCVideoSinkBehavior:Awake () (at ./Packages/com.magicleap.unitysdk/Runtime/APIs/WebRTC/Scripts/MLWebRTCVideoSinkBehavior.cs:55)

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**Author:** ![kdowney](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.magicleap.cloud/kdowney/32/481_2.png) [@kdowney](https://forum.magicleap.cloud/u/kdowney)\
**Post date:** [February 24, 2023, 1:29am UTC](https://forum.magicleap.cloud/t/api-failed-not-implemented/1523/2 "2023-02-24T01:29:41Z")

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Hi @nathan welcome to the Magic Leap 2 Forum and thanks for your post. Sorry to say WebRTC is not currently supported on App Sim.

You can check out a list supported API features on App Sim [here](https://developer-docs.magicleap.cloud/docs/guides/developer-tools/app-sim/app-sim-key-api-features). Unsupported API features compile and link for host targets, but return `MLResult_NotImplemented` when requested, like in the error you're receiving.