# Error while starting simulation

**URL:** <https://community.freefem.org/t/error-while-starting-simulation/1818>\
**Category:** General Discussion\
**Created:** [June 18, 2022, 6:41am UTC](https://community.freefem.org/t/error-while-starting-simulation/1818 "2022-06-18T06:41:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![zese](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/zese/32/917_2.png) [@zese](https://community.freefem.org/u/zese)\
**Post date:** [June 18, 2022, 6:41am UTC](https://community.freefem.org/t/error-while-starting-simulation/1818/1 "2022-06-18T06:41:40Z")

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Dear all

I did a simulation on a mesh with 160000 elements. then I adapted mesh and wanted to continue the simulation on 139000 element mesh but I received an error.  
– mesh: Nb of Triangles = 139281, Nb of Vertices 70000  
Strange catch exception ???  
at exec line 67 , mpirank 0

do you know why?

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<div class="post-metadata">

**Author:** ![frederichecht](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/frederichecht/32/15_2.png) [@frederichecht](https://community.freefem.org/u/frederichecht)\
**Post date:** [June 18, 2022, 2:41pm UTC](https://community.freefem.org/t/error-while-starting-simulation/1818/2 "2022-06-18T14:41:16Z")

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It mean a function make a exception so without the script it is impossible to say more!