# System blown up in production run

**URL:** <https://gromacs.bioexcel.eu/t/system-blown-up-in-production-run/9429>\
**Category:** User discussions\
**Created:** [June 19, 2024, 6:17am UTC](https://gromacs.bioexcel.eu/t/system-blown-up-in-production-run/9429 "2024-06-19T06:17:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Vignesh666D](https://avatars.discourse-cdn.com/v4/letter/v/b9bd4f/32.png) [@Vignesh666D](https://gromacs.bioexcel.eu/u/Vignesh666D)\
**Post date:** [June 19, 2024, 6:17am UTC](https://gromacs.bioexcel.eu/t/system-blown-up-in-production-run/9429/1 "2024-06-19T06:17:29Z")

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GROMACS version:  
GROMACS modification: Yes/No  
Here post your question  
Note:  
The bond in molecule-type CHYO between atoms 1 R0 and 2 R1 has an  
estimated oscillational period of 2.1e-01 ps, which is less than 10 times  
the time step of 3.0e-02 ps.  
Maybe you forgot to change the constraints mdp option  
In constraints I used h-bonds  
when I neglect the notes I started the production run  
It was running fine until 0.6us after that it started blown up throwing step files and linics warning  
Fatal error:  
one or more atoms moved too far between domain decomposition steps  
this usually means that your system is not well equilibrated  
Kindly help me with this

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**Author:** ![Karis](https://avatars.discourse-cdn.com/v4/letter/k/ed8c4c/32.png) [@Karis](https://gromacs.bioexcel.eu/u/Karis)\
**Post date:** [June 19, 2024, 7:03am UTC](https://gromacs.bioexcel.eu/t/system-blown-up-in-production-run/9429/2 "2024-06-19T07:03:55Z")

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Could you provide details on what system you’re simulating, what commands you used to set up the simulation, and any additional notes/warnings/errors you encountered during each step? The more information, the easier it is to help