# Type of surface element

**URL:** <https://community.freefem.org/t/type-of-surface-element/72>\
**Category:** General Discussion\
**Created:** [June 12, 2019, 4:20pm UTC](https://community.freefem.org/t/type-of-surface-element/72 "2019-06-12T16:20:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![agTSL](https://avatars.discourse-cdn.com/v4/letter/a/f05b48/32.png) [@agTSL](https://community.freefem.org/u/agTSL)\
**Post date:** [June 12, 2019, 4:20pm UTC](https://community.freefem.org/t/type-of-surface-element/72/1 "2019-06-12T16:20:42Z")

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Hi,  
I would like to use surface element which are new in v4.2.1. What are the types of these elements?  
During the freefem day in 2018, I writed that was P1S, but it doesn’t work.

Best Regards  
Alexandre

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**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 12, 2019, 4:57pm UTC](https://community.freefem.org/t/type-of-surface-element/72/2 "2019-06-12T16:57:12Z")

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you have example in directory examples/3dSurf of the disturb

or at [https://github.com/FreeFem/FreeFem-sources/tree/master/examples/3dSurf](https://github.com/FreeFem/FreeFem-sources/tree/master/examples/3dSurf)

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**Author:** ![agTSL](https://avatars.discourse-cdn.com/v4/letter/a/f05b48/32.png) [@agTSL](https://community.freefem.org/u/agTSL)\
**Post date:** [June 13, 2019, 8:01am UTC](https://community.freefem.org/t/type-of-surface-element/72/3 "2019-06-13T08:01:00Z")

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Hi,  
Thanks you to your answer. I downloaded example and tried to use it but the key word “meshS” is not know during compilation of the .edp example.  
I use freefem 4.2.1 on Windows ( installed with FreeFem.-4.2-1-win64.exe). Do I need to compile the last master version with your link?  
Best Regards,  
Alexandre