# Alpha\_zero CUDA error

**URL:** <https://discuss.ray.io/t/alpha-zero-cuda-error/2191>\
**Category:** RLlib\
**Created:** [May 18, 2021, 2:57pm UTC](https://discuss.ray.io/t/alpha-zero-cuda-error/2191 "2021-05-18T14:57:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![aronium](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/aronium/32/1068_2.png) [@aronium](https://discuss.ray.io/u/aronium)\
**Post date:** [May 18, 2021, 2:57pm UTC](https://discuss.ray.io/t/alpha-zero-cuda-error/2191/1 "2021-05-18T14:57:30Z")

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Hello Guys,

thank you for providing this forum, its very informative and useful.

I have a question regarding the alpha\_zero algorithm provided by RLLib:

I startet the train\_cartpole.py script, but it gets interrupted by the following error:

 ![Unbenannt](https://us1.discourse-cdn.com/flex020/uploads/ray/original/2X/3/36259b4a9a66c071bb5fe224318bbcef7ff9795d.png)

Do you guys have any idea how to solve this?

Thank you in advance!

Best,  
Aaron

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**Author:** ![sven1977](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/sven1977/32/53_2.png) [@sven1977](https://discuss.ray.io/u/sven1977)\
**Post date:** [May 19, 2021, 3:40pm UTC](https://discuss.ray.io/t/alpha-zero-cuda-error/2191/2 "2021-05-19T15:40:52Z")

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Hey @aronium , thanks for bringing this up. I see this is an interesting Win GPU related error (I remember having seen these as well sometimes on my machine). Which Ray version are you on?