# CCTM NSTEPS for long period (20 days)

**URL:** <https://forum.cmascenter.org/t/cctm-nsteps-for-long-period-20-days/290>\
**Category:** Run Time Errors and Issues\
**Created:** [September 12, 2018, 4:09pm UTC](https://forum.cmascenter.org/t/cctm-nsteps-for-long-period-20-days/290 "2018-09-12T16:09:56Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ever.barreto](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.cmascenter.org/ever.barreto/32/778_2.png) [@ever.barreto](https://forum.cmascenter.org/u/ever.barreto)\
**Post date:** [September 12, 2018, 4:09pm UTC](https://forum.cmascenter.org/t/cctm-nsteps-for-long-period-20-days/290/1 "2018-09-12T16:09:56Z")

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Hi all!

I’m trying to run CCTM for a 20 days period and, looking at the `run_cctm.sh` script, I see the following:

```
set NSTEPS = 240000 #> time duration (HHMMSS) for this run

```

and I wanted to know how I can configure this for a long run? If I set that value to:

`4800000`

hours (20 days) it doesn’t longer conform to the expected format (HHMMSS).

How can I configure this parameter for a long simulation?

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**Author:** ![ernesto.pinoc](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.cmascenter.org/ernesto.pinoc/32/43_2.png) [@ernesto.pinoc](https://forum.cmascenter.org/u/ernesto.pinoc)\
**Post date:** [September 12, 2018, 4:24pm UTC](https://forum.cmascenter.org/t/cctm-nsteps-for-long-period-20-days/290/2 "2018-09-12T16:24:41Z")

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Hello:  
Just put  
set NSTEPS = 4800000

Don´t worry about if you insert another digit for HH. It will run for 20 days.  
I ran 15 days using 3600000 and it finished successfully.

Hope this help you

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<div class="post-metadata">

**Author:** ![ever.barreto](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.cmascenter.org/ever.barreto/32/778_2.png) [@ever.barreto](https://forum.cmascenter.org/u/ever.barreto)\
**Post date:** [September 12, 2018, 4:35pm UTC](https://forum.cmascenter.org/t/cctm-nsteps-for-long-period-20-days/290/3 "2018-09-12T16:35:28Z")

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ahhh perfect, thank you Ernesto!