# Using MultiBinary as an observation space

**URL:** <https://discuss.ray.io/t/using-multibinary-as-an-observation-space/7703>\
**Category:** RLlib\
**Created:** [September 28, 2022, 6:31pm UTC](https://discuss.ray.io/t/using-multibinary-as-an-observation-space/7703 "2022-09-28T18:31:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cool-RR](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/cool-rr/32/2821_2.png) [@cool-RR](https://discuss.ray.io/u/cool-RR)\
**Post date:** [September 28, 2022, 6:31pm UTC](https://discuss.ray.io/t/using-multibinary-as-an-observation-space/7703/1 "2022-09-28T18:31:22Z")

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**How severe does this issue affect your experience of using Ray?**

- Medium: It contributes to significant difficulty to complete my task, but I can work around it.

I’d like to make an RL experiment where the observation space is a `MultiBinary` space. Is this possible with RLlib? Is there anywhere an example of such an environment?

When I tried running it, I got this bug: [RLlib: RecursionError when using MultiBinary space · Issue #28605 · ray-project/ray · GitHub](https://github.com/ray-project/ray/issues/28605)

Thanks,  
Ram.

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**Author:** ![arturn](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/arturn/32/2096_2.png) [@arturn](https://discuss.ray.io/u/arturn)\
**Post date:** [September 29, 2022, 11:50am UTC](https://discuss.ray.io/t/using-multibinary-as-an-observation-space/7703/2 "2022-09-29T11:50:57Z")

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@cool-RR Thank’s for filing the bug! I’ll triage later today and then we can discuss on GH! 🙂