# Error in importing weight window

**URL:** <https://openmc.discourse.group/t/error-in-importing-weight-window/5409>\
**Category:** User Support\
**Created:** [April 3, 2025, 7:37pm UTC](https://openmc.discourse.group/t/error-in-importing-weight-window/5409 "2025-04-03T19:37:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Sayed\_Ahmed](https://avatars.discourse-cdn.com/v4/letter/s/8797f3/32.png) [@Sayed\_Ahmed](https://openmc.discourse.group/u/Sayed_Ahmed)\
**Post date:** [April 3, 2025, 7:37pm UTC](https://openmc.discourse.group/t/error-in-importing-weight-window/5409/1 "2025-04-03T19:37:44Z")

</div>

Hi everyone!

**ModuleNotFoundError: No module named ‘openmc\_weight\_window\_generator’**  
this error message is being shown when I try this command:  
**import openmc\_weight\_window\_generator**

how can I import that ? or whats the solution for that?  
Any reply is highly appreciated!