# Error while doing simulation run

**URL:** <https://www.simscale.com/forum/t/error-while-doing-simulation-run/83815>\
**Category:** Project Support\
**Created:** [December 20, 2018, 7:41pm UTC](https://www.simscale.com/forum/t/error-while-doing-simulation-run/83815 "2018-12-20T19:41:37Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jousefm](https://www.simscale.com/forum/user_avatar/www.simscale.com/jousefm/32/34908_2.png) [@jousefm](https://www.simscale.com/forum/u/jousefm)\
**Post date:** [December 20, 2018, 9:21pm UTC](https://www.simscale.com/forum/t/error-while-doing-simulation-run/83815/2 "2018-12-20T21:21:47Z")

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Hi there @odickinson!

So there are several things I want to mention:

- Your mesh finished without an illegal cell that might cause the sim to fail so that’s fine, however the bounding box is meshed in a non-isotropic way if you want to call it like that which will definitely cause troubles

- In addition to that your domain is way too small - the boundaries will affect your flow and mess up your results up

- Also the **Maximum runtime** in the **Simulation Control** is set to **3000 s** which means that your simulation will definitely stop after hitting that mark. You should increase that section and also think about the intervals where you want to have results written, called **Write Interval**

* * *

A good start for you would be to have a look at an (outdated) tutorial right here covering a rear wing: **[Step-by-Step Tutorial: Homework of Session 2](https://www.simscale.com/forum/t/step-by-step-tutorial-homework-of-session-2/14204)** (we are working on updating the old workshop material which will take a while). If you have any questions feel free to reach out to us and we will help you out!

Best,

Jousef

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