# Stream.wait() returns None

**URL:** <https://forum.commonvisionblox.com/t/stream-wait-returns-none/2341>\
**Category:** Python API\
**Created:** [January 9, 2025, 1:45pm UTC](https://forum.commonvisionblox.com/t/stream-wait-returns-none/2341 "2025-01-09T13:45:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sewtsbh](https://avatars.discourse-cdn.com/v4/letter/s/f14d63/32.png) [@sewtsbh](https://forum.commonvisionblox.com/u/sewtsbh)\
**Post date:** [January 9, 2025, 1:45pm UTC](https://forum.commonvisionblox.com/t/stream-wait-returns-none/2341/1 "2025-01-09T13:45:17Z")

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I am trying to get an image from the teledyne dalsa linea line camera. I am using TriggerMode off. When I call the stream.wait() it returns \<class ‘NoneType’\> instead of composite. In the GenICam browser with same settings I am able to see an image. I am using Ubuntu 21.04.05 LTS and the latest version of cvb.

```auto
stream = device.stream(stream_type=cvb.CompositeStream)
stream.start()
composite, status, node_enum = stream.wait()

```

I also have a 2d camera from lucid and it works fine with the same code.

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<div class="post-metadata">

**Author:** ![Sebastian](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.commonvisionblox.com/sebastian/32/1267_2.png) [@Sebastian](https://forum.commonvisionblox.com/u/Sebastian)\
**Post date:** [January 10, 2025, 8:43am UTC](https://forum.commonvisionblox.com/t/stream-wait-returns-none/2341/2 "2025-01-10T08:43:29Z")

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Hi @sewtsbh,

Did you check the status? If the status is OK, you should get a valid composite.

I also want to know which PixelFormat you use. Currently we have an issue with the Linea Color and its BiColorRGB8 PixelFormat.