# Problem with post processing

**URL:** <https://www.simscale.com/forum/t/problem-with-post-processing/92634>\
**Category:** Post-processing\
**Created:** [May 3, 2021, 11:52am UTC](https://www.simscale.com/forum/t/problem-with-post-processing/92634 "2021-05-03T11:52:18Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![pnordkamp](https://www.simscale.com/forum/letter_avatar/pnordkamp/32/5_5575768a8748004e209b776fc1b2916d.png) [@pnordkamp](https://www.simscale.com/forum/u/pnordkamp)\
**Post date:** [May 3, 2021, 11:52am UTC](https://www.simscale.com/forum/t/problem-with-post-processing/92634/1 "2021-05-03T11:52:18Z")

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![image](https://www.simscale.com/forum/uploads/default/original/3X/b/c/bc1c762e0cff8dd5aedc1d27695e764640073f64.png)  
 ![image](https://www.simscale.com/forum/uploads/default/original/3X/5/d/5da8d810b8610677cc2207a69766813fe79ed75a.png)

This shows that my simulation is finished but it took only 20 minutes. It should last at least 290 minutes.  
This is why my chart shows only 2 seconds instead of the needed 3000 seconds. My question is what causes this failure of a simulation and how do i fix it.

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**Author:** ![tsite](https://www.simscale.com/forum/user_avatar/www.simscale.com/tsite/32/47909_2.png) [@tsite](https://www.simscale.com/forum/u/tsite)\
**Post date:** [May 3, 2021, 12:09pm UTC](https://www.simscale.com/forum/t/problem-with-post-processing/92634/2 "2021-05-03T12:09:04Z")

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Hi there, thank you for using the forum! Can you also include a link to your project please, so I can check?

Best regards,  
Fillia

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<div class="post-metadata">

**Author:** ![pnordkamp](https://www.simscale.com/forum/letter_avatar/pnordkamp/32/5_5575768a8748004e209b776fc1b2916d.png) [@pnordkamp](https://www.simscale.com/forum/u/pnordkamp)\
**Post date:** [May 3, 2021, 1:07pm UTC](https://www.simscale.com/forum/t/problem-with-post-processing/92634/3 "2021-05-03T13:07:15Z")

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<div class="post-metadata">

**Author:** ![RicardoParis](https://www.simscale.com/forum/user_avatar/www.simscale.com/ricardoparis/32/30222_2.png) [@RicardoParis](https://www.simscale.com/forum/u/RicardoParis)\
**Post date:** [May 4, 2021, 3:00pm UTC](https://www.simscale.com/forum/t/problem-with-post-processing/92634/4 "2021-05-04T15:00:40Z")

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Hi,

The problem here is the residual control definition under Numerics. These values must have been changed by you, since the default settings are very different:

 ![image](https://www.simscale.com/forum/uploads/default/original/3X/1/e/1ec58676b87c55dfd782c9b952d17e4f9fb32bcc.png)

The absolute tolerance for the residual controls acts as a stopping criteria for the simulation. When the residuals from all these parameters drop below the defined values, the simulation is stopped. The default values are 1e-6, if I recall correctly.

With values of 0.9, the simulation achieves the stopping criteria after 2 iterations and stops. In short, I would recommend refreshing the numerics to default (there is a reset button right here):

 ![image](https://www.simscale.com/forum/uploads/default/original/3X/4/6/46cbd8a20adb2b42b16e73b8966c253296e6fded.png)

Cheers

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<div class="post-metadata">

**Author:** ![pnordkamp](https://www.simscale.com/forum/letter_avatar/pnordkamp/32/5_5575768a8748004e209b776fc1b2916d.png) [@pnordkamp](https://www.simscale.com/forum/u/pnordkamp)\
**Post date:** [May 5, 2021, 11:33am UTC](https://www.simscale.com/forum/t/problem-with-post-processing/92634/5 "2021-05-05T11:33:55Z")

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> [@RicardoParis](#):
>
> is the residual control definition under Nu

thanks