# How to store and read the solution files of a particular case in butterfly?

**URL:** <https://discourse.ladybug.tools/t/how-to-store-and-read-the-solution-files-of-a-particular-case-in-butterfly/2159>\
**Category:** butterfly\
**Created:** [October 9, 2017, 9:28am UTC](https://discourse.ladybug.tools/t/how-to-store-and-read-the-solution-files-of-a-particular-case-in-butterfly/2159 "2017-10-09T09:28:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Grasshope](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/grasshope/32/4_2.png) [@Grasshope](https://discourse.ladybug.tools/u/Grasshope)\
**Post date:** [October 9, 2017, 9:28am UTC](https://discourse.ladybug.tools/t/how-to-store-and-read-the-solution-files-of-a-particular-case-in-butterfly/2159/1 "2017-10-09T09:28:29Z")

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I manage to run the butterfly outdoor airflow demo file, finally…

May I ask how to store and read the solution files for a particular case once the simulation is finished?

It seems that if the input geometry and parameters remain the same, re-running a previously finished simulation is very fast, and I assume it’s just reading the stored results.

Thanks.

 ![Image 36](https://discourse.ladybug.tools/uploads/default/original/2X/4/47b63873272a9cf3168d431050f61fa80dc61790.png)

 ![Image 37](https://discourse.ladybug.tools/uploads/default/original/2X/d/dd9e188fe9fc5db0eafe001375ae42001e64e25c.png)

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**Author:** ![JuliaT](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/juliat/32/41_2.png) [@JuliaT](https://discourse.ladybug.tools/u/JuliaT)\
**Post date:** [October 10, 2017, 11:10am UTC](https://discourse.ladybug.tools/t/how-to-store-and-read-the-solution-files-of-a-particular-case-in-butterfly/2159/2 "2017-10-10T11:10:55Z")

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> [@Grasshope](#):
>
> It seems that if the input geometry and parameters remain the same, re-running a previously finished simulation is very fast, and I assume it’s just reading the stored results

I have the same problem! Internalising the data works for the points, vectors and mesh of course. But is it possible to reload a case to analyse what is happening in different points???

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**Author:** ![TheodorosGalanos](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/theodorosgalanos/32/5_2.png) [@TheodorosGalanos](https://discourse.ladybug.tools/u/TheodorosGalanos)\
**Post date:** [October 10, 2017, 2:00pm UTC](https://discourse.ladybug.tools/t/how-to-store-and-read-the-solution-files-of-a-particular-case-in-butterfly/2159/3 "2017-10-10T14:00:41Z")

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Hi Grasshope,

See this: [Butterfly, Reload a case](https://discourse.ladybug.tools/t/butterfly-reload-a-case/2162/2?u=theodorosgalanos)

Hope it helps!

Kind regards,  
Theodore.

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**Author:** ![Grasshope](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/grasshope/32/4_2.png) [@Grasshope](https://discourse.ladybug.tools/u/Grasshope)\
**Post date:** [October 10, 2017, 4:51pm UTC](https://discourse.ladybug.tools/t/how-to-store-and-read-the-solution-files-of-a-particular-case-in-butterfly/2159/4 "2017-10-10T16:51:53Z")

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Thank you very much, Theodore! Will check these functions later.