# Geometric definition error

**URL:** <https://openmc.discourse.group/t/geometric-definition-error/393>\
**Category:** User Support\
**Created:** [January 27, 2019, 9:29am UTC](https://openmc.discourse.group/t/geometric-definition-error/393 "2019-01-27T09:29:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Tang\_Qi](https://avatars.discourse-cdn.com/v4/letter/t/49beb7/32.png) [@Tang\_Qi](https://openmc.discourse.group/u/Tang_Qi)\
**Post date:** [January 27, 2019, 9:29am UTC](https://openmc.discourse.group/t/geometric-definition-error/393/1 "2019-01-27T09:29:50Z")

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Hello,everyone!  
The data I recently used in this manual was run on openmc, but the space geometry I got was not what I expected. What is my error?

Thank you very much!

 ![plot.png](https://global.discourse-cdn.com/free1/uploads/openmc/original/1X/d12e504950ac312da583dc14f24db5eb337a72fa.png)

 ![ring.jpg](https://global.discourse-cdn.com/free1/uploads/openmc/original/1X/69d46b9cbef79e7b6ebb3a9ccac11e39d0384465.jpeg)

[SOL-Case-3.py](https://openmc.discourse.group/uploads/short-url/jrJSm5IR6RJHzsd3UnH5Jx9fILO.py) (5.33 KB)

[Lst005.pdf](https://openmc.discourse.group/uploads/short-url/3qks2QePBLSogCYhe2sfRYY47DC.pdf) (254 KB)

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<div class="post-metadata">

**Author:** ![Tang\_Qi](https://avatars.discourse-cdn.com/v4/letter/t/49beb7/32.png) [@Tang\_Qi](https://openmc.discourse.group/u/Tang_Qi)\
**Post date:** [January 29, 2019, 3:13am UTC](https://openmc.discourse.group/t/geometric-definition-error/393/2 "2019-01-29T03:13:36Z")

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I modified the plot and the problem was solved.

 ![plot2.png](https://global.discourse-cdn.com/free1/uploads/openmc/original/1X/e0c6fbf5b0b8112543cb12944fb5f3fa5b5afee6.png)