# Distribution of fission reactions

**URL:** <https://openmc.discourse.group/t/distribution-of-fission-reactions/2802>\
**Category:** User Support\
**Created:** [March 5, 2023, 11:36am UTC](https://openmc.discourse.group/t/distribution-of-fission-reactions/2802 "2023-03-05T11:36:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Rahma](https://avatars.discourse-cdn.com/v4/letter/r/ee59a6/32.png) [@Rahma](https://openmc.discourse.group/u/Rahma)\
**Post date:** [March 5, 2023, 11:36am UTC](https://openmc.discourse.group/t/distribution-of-fission-reactions/2802/1 "2023-03-05T11:36:02Z")

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Hallo Everyone…  
I want to look for the distribution of fission reactions but when calling the program the tally file cannot be found even though I have included the tally program when running burn up. Please help me to fix this error🙏

 ![Screenshot_2023-03-05-18-34-35-29_99c04817c0de5652397fc8b56c3b3817](https://global.discourse-cdn.com/free1/uploads/openmc/original/2X/3/3ec8fd0c858a05073c89c2ce4dd689fe5b73a21b.jpeg)

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**Author:** ![bentridisalah](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/bentridisalah/32/1421_2.png) [@bentridisalah](https://openmc.discourse.group/u/bentridisalah)\
**Post date:** [March 10, 2023, 3:19pm UTC](https://openmc.discourse.group/t/distribution-of-fission-reactions/2802/2 "2023-03-10T15:19:11Z")

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Hi @Rahma

I’m not sure, but the problem may be occur if tally data was not proprely loaded from the obtained files : simulation\_nx.h5, also you need to check that your tally was taken into consideration by your model when running openmc, this could be verified by the creation of not-empty file tallies.xml and tallies.out at the end of depletion calculation.

In any case, a shot of the corresponding part of the used python code will be usefull to find the error source efficiently.

Regards

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**Author:** ![Rahma](https://avatars.discourse-cdn.com/v4/letter/r/ee59a6/32.png) [@Rahma](https://openmc.discourse.group/u/Rahma)\
**Post date:** [March 19, 2023, 2:45am UTC](https://openmc.discourse.group/t/distribution-of-fission-reactions/2802/3 "2023-03-19T02:45:31Z")

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Sorry sir, can you show me how to fix it so the tally file can be found?