# Zoom Windows SDK - BO Admin CanStartBO() Returns False

**URL:** <https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038>\
**Category:** Windows\
**Created:** [November 10, 2021, 3:36am UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038 "2021-11-10T03:36:09Z")\
**Posts on this page:** 15\
**Page:** 1

<div class="post-metadata">

**Author:** ![peter.chen](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/peter.chen/32/11525_2.png) [@peter.chen](https://devforum.zoom.us/u/peter.chen)\
**Post date:** [November 10, 2021, 3:36am UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/1 "2021-11-10T03:36:09Z")

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**Description**  
Our team is trying to use the Zoom Windows SDK to manipulate the breakout room creation and participant allocation. We have been adding C# wrappers for breakout room controls. Automating the breakout room creation and assigning users into breakout rooms seem to be working fine (although a significant amount of delay is required between these function calls).

However, when we try to use the customised app to start breakout rooms, `CanStartBO()` from the IBOAdmin class seems to always return false. Consequently, when we call `StartBO()`, the breakout rooms cannot be started. Also, when we call `StartBO()`, a weird error `TokenNotReady` is returned. If we use the UI from the customised app to Start All Breakout Rooms, breakout rooms can be started successfully.

Since the wrapper is correctly fetching the `CanStartBO()` status and it is showing false, we think that the issue must be related to the Zoom Windows SDK itself?

**Which Windows Meeting SDK version?**  
v5.7.6.1079

**Additional context**  
Here are some logs from our customised Zoom application, and hopefully these can provide some extra information for diagnosing the issue:

```auto
Create Test Room 1
Start Assign Users
AssignUserToBO(961752fd474906b7c1205e3045d2386d, {DD2997A2-BE17-4A98-BAC0-84BF36BE1B47}) Result: True
BOController.GetBOStatus() -> Edit
**BOController.GetBOAdminHelper().CanStartBO() -> False**
Retry Starting BO
**Callback[onStartBOError] -> TokenNotReady**
Retry Starting BO
**Callback[onStartBOError] -> TokenNotReady**
Retry Starting BO
**Callback[onStartBOError] -> TokenNotReady**
Retry Starting BO

```

Thanks a lot in advance for your help!

Kind regards,  
Peter

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<div class="post-metadata">

**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\
**Post date:** [November 11, 2021, 11:58pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/2 "2021-11-11T23:58:46Z")

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Hey @peter.chen,

Thanks for using the dev forum!

Are you able to start breakout rooms using the default UI?

Thanks!  
Michael

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<div class="post-metadata">

**Author:** ![peter.chen](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/peter.chen/32/11525_2.png) [@peter.chen](https://devforum.zoom.us/u/peter.chen)\
**Post date:** [November 12, 2021, 12:44am UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/3 "2021-11-12T00:44:30Z")

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Hi Michael,

Yes, if I use the default UI, the breakout room can be started successfully. But when using the SDK, a `TokenNotReady` error is returned when I try to start breakout rooms automatically.

Kind regards,  
Peter

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<div class="post-metadata">

**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\
**Post date:** [November 15, 2021, 11:41pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/4 "2021-11-15T23:41:16Z")

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Hey @peter.chen,

At what point are you trying to start the breakout room? Is it right when you enter a meeting? I am curious if there is a race condition here.

Thanks!  
Michael

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<div class="post-metadata">

**Author:** ![peter.chen](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/peter.chen/32/11525_2.png) [@peter.chen](https://devforum.zoom.us/u/peter.chen)\
**Post date:** [November 16, 2021, 12:03am UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/5 "2021-11-16T00:03:33Z")

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Hi Michael,

Not immediately after entering a meeting. We trigger the breakout room manipulation after assigning a customised Zoom app with host permission, and we add delay for each step (create breakout rooms, assign users to breakout rooms, and start breakout rooms).

But yea, in general, it will be at least a minute after entering the meeting before we try to start breakout rooms.

Kind regards,  
Peter

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<div class="post-metadata">

**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\
**Post date:** [November 18, 2021, 10:11pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/6 "2021-11-18T22:11:50Z")

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Hey @peter.chen,

Can you email me at [DeveloperSupport@zoom.us](mailto:DeveloperSupport@zoom.us)? In the email please provide the following:

1. Reproduction steps
2. SDK logs: To get them, reproduce the issue once more with enableLog set to true in your initParams. After closing the application, the logs will show up in %appData%/roaming/ZoomSDK
3. A link to this post
4. Mention my name

Thanks!  
Michael

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<div class="post-metadata">

**Author:** ![peter.chen](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/peter.chen/32/11525_2.png) [@peter.chen](https://devforum.zoom.us/u/peter.chen)\
**Post date:** [November 18, 2021, 11:15pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/7 "2021-11-18T23:15:29Z")

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Hi Michael,

Sure thing. I just sent an email to [DeveloperSupport@zoom.us](mailto:DeveloperSupport@zoom.us) with the detailed you requested for investigation.

Kind regards,  
Peter

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<div class="post-metadata">

**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\
**Post date:** [December 2, 2021, 12:21am UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/8 "2021-12-02T00:21:25Z")

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Hey @peter.chen,

Thanks! Will follow up with you there.

Michael

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<div class="post-metadata">

**Author:** ![jon.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/jon.zoom/32/13495_2.png) [@jon.zoom](https://devforum.zoom.us/u/jon.zoom)\
**Post date:** [December 6, 2021, 10:39pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/9 "2021-12-06T22:39:51Z")

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Hi @peter.chen,

Thanks for your patience as we investigated this issue. Based on the information provided, you should wait for the [`onBOCreateSuccess`](https://marketplacefront.zoom.us/sdk/meeting/windows/class_i_b_o_creator_event.html#ac7b9abc1b533102cf53d4fe621c9530f) callback before trying to start a breakout room. Let me know if you are having any issues with this approach and we can investigate further.

Thanks!

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<div class="post-metadata">

**Author:** ![peter.chen](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/peter.chen/32/11525_2.png) [@peter.chen](https://devforum.zoom.us/u/peter.chen)\
**Post date:** [December 7, 2021, 12:38am UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/10 "2021-12-07T00:38:54Z")

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Hi Jon,

Thanks a lot for your reply! Unfortunately, after trying out your suggested approach, it still doesn’t work.

However, I did find some more information during the investigation process which might be helpful for your team to diagnose the issue.

I register the callback for `onHasCreatorRightsNotification`. When I assign the customised Zoom App with host permission, this callback will be triggered and I will start the breakout room creation & participant allocation process.

According to the logs below, it seems that the room has been created and the user has been assigned successfully to the newly created breakout room. However, when I try to call `BOController.GetBOAdminHelper().StartBO()`, it returns an error. Even if I manually click the `Open All Breakout Rooms` button on the customised app’s UI now, nothing happens.

I added the `onBOCreateSuccess` callback for the app, but this callback is never triggered even though I can see the room being created in the customised app’s UI.

 ![BO Issue](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/1/f/1ff93aea206e75cc133537207b929b67e0560718.png)

> Create Room 1: {D431979C-437E-4753-95CB-4BAB3CE14F37}  
> AssignUserToBO (875cc6004f63f2cb3cfe19e720774344, {D431979C-437E-4753-95CB-4BAB3CE14F37}) Result: True  
> BOController.GetBOStatus() → Edit  
> BOController.GetBOAdminHelper().CanStartBO() → False  
> Retry Starting BO  
> Callback[onStartBOError] → TokenNotReady  
> Retry Starting BO

However, when I try to create a new breakout room just using the UI of the customised app, the `onBOCreateSuccess` callback is immediately triggered successfully, and starting the breakout rooms seem to be working fine as well.

Hence, I think the issue is not actually related to the BO Admin (for starting the breakout room). It is more likely that even though the `BOCreator.CreateBO()` returns a breakout room ID (indicate that the room has been created successfully) and it is appearing on the customised app’s UI, it is not being created internally?

Not super sure whether I have explained the details clearly, but hopefully these will be helpful for your investigation.

Thanks a lot!  
Peter

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<div class="post-metadata">

**Author:** ![jon.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/jon.zoom/32/13495_2.png) [@jon.zoom](https://devforum.zoom.us/u/jon.zoom)\
**Post date:** [December 9, 2021, 6:03pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/11 "2021-12-09T18:03:36Z")

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Hi @peter.chen, thanks for the additional information.

Based on the screenshot you’ve provided, I have another question. Are you using the default meeting UI when you try calling the BO-related functions? They are only meant to be used with custom UI mode, so I want to make sure we’re not missing something on that front.

Thanks!

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<div class="post-metadata">

**Author:** ![peter.chen](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/peter.chen/32/11525_2.png) [@peter.chen](https://devforum.zoom.us/u/peter.chen)\
**Post date:** [January 4, 2022, 2:57am UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/12 "2022-01-04T02:57:50Z")

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Hi Jon,

Happy new year and thanks for your reply! I wasn’t aware that the breakout room functions can only be used for the Custom UI mode since all other features except for starting the breakout room works fine with the default meeting UI that I have been using.

I tried to modify my code and use the Custom UI for exploring the Breakout Room feature, but unfortunately, same error was returned to me even with the Custom UI mode.

Since the error is showing `TokenNotReady`, wonder if you have any idea what does this indicate by any chance? Could it be relevant to the fact that I am using `JoinParam4WithoutLogin` when instructing the custom app to join a Zoom meeting?

Kind regards,  
Peter

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<div class="post-metadata">

**Author:** ![peter.chen](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/peter.chen/32/11525_2.png) [@peter.chen](https://devforum.zoom.us/u/peter.chen)\
**Post date:** [January 4, 2022, 3:14am UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/13 "2022-01-04T03:14:50Z")

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Sorry, I just tried with `Join4NormalUser` and it seems that the `TokenNotReady` error still exists.

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<div class="post-metadata">

**Author:** ![jon.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/jon.zoom/32/13495_2.png) [@jon.zoom](https://devforum.zoom.us/u/jon.zoom)\
**Post date:** [January 6, 2022, 6:36pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/14 "2022-01-06T18:36:24Z")

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Hi @peter.chen, happy new year to you as well!

> I wasn’t aware that the breakout room functions can only be used for the Custom UI mode since all other features except for starting the breakout room works fine with the default meeting UI that I have been using.

The breakout feature is unique in this regard that it can only be used through the default UI or programmatically with a custom UI. Other SDK features can be used interchangeably, but breakout rooms can only be one or the other.

> I tried to modify my code and use the Custom UI for exploring the Breakout Room feature, but unfortunately, same error was returned to me even with the Custom UI mode.

Can you confirm which modifications have been made? Are you certain that there are no default UI elements related to the breakout room feature present when you try to programmatically setup the rooms?

> Since the error is showing `TokenNotReady` , wonder if you have any idea what does this indicate by any chance? Could it be relevant to the fact that I am using `JoinParam4WithoutLogin` when instructing the custom app to join a Zoom meeting?

The params used to join the main meeting should not matter, as long as the current user has sufficient privileges to perform the breakout functionality you are attempting, as mentioned earlier through the related callbacks.

Thanks!

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [February 6, 2022, 4:37am UTC](https://devforum.zoom.us/t/zoom-windows-sdk-bo-admin-canstartbo-returns-false/60038/15 "2022-02-06T04:37:01Z")

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Closed on February 6, 2022, 4:37am UTC

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