# Problem with surface from points

**URL:** <https://discourse.mcneel.com/t/problem-with-surface-from-points/213989>\
**Category:** Grasshopper\
**Tags:** windows\
**Created:** [December 25, 2025, 9:42pm UTC](https://discourse.mcneel.com/t/problem-with-surface-from-points/213989 "2025-12-25T21:42:21Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![baran](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/baran/32/717904_2.png) [@baran](https://discourse.mcneel.com/u/baran)\
**Post date:** [December 25, 2025, 9:42pm UTC](https://discourse.mcneel.com/t/problem-with-surface-from-points/213989/1 "2025-12-25T21:42:21Z")

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hello ,

i need some help with my grasshopper script. my points are looking fine but it says “ A point in the grid is null. Fitting operation aborted “ then i am trying to make the surface. i would appriciate so much , some help

merry xmas

[25.12 aa.gh](https://discourse.mcneel.com/uploads/short-url/xVqyc6AsnioPNJBZYjf4lDJXfCy.gh) (33.3 KB)

 ![Screenshot 2025-12-25 192622](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/2/2/a/22abc43fb31c83022b7cc53843b096fa273533f3.png)

 ![Screenshot 2025-12-25 192542](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/c/9/e/c9e6242e6a6a99b41b4c027ea35b9bbe98910784.png)

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**Author:** ![Ali\_Najmaei](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/ali_najmaei/32/636031_2.png) [@Ali\_Najmaei](https://discourse.mcneel.com/u/Ali_Najmaei)\
**Post date:** [December 25, 2025, 10:12pm UTC](https://discourse.mcneel.com/t/problem-with-surface-from-points/213989/2 "2025-12-25T22:12:39Z")

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Please internalize required curves

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<div class="post-metadata">

**Author:** ![baran](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/baran/32/717904_2.png) [@baran](https://discourse.mcneel.com/u/baran)\
**Post date:** [December 25, 2025, 10:18pm UTC](https://discourse.mcneel.com/t/problem-with-surface-from-points/213989/3 "2025-12-25T22:18:02Z")

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hi , basically i want to create a surface that will be deformed by a open curve and moving that curve on rhino will change the surface i thought to have a exterior and interior curve , i am sharing my rhino file , i am extremly new in grasshopper ( i want to apply the script also in other similar curves this is wy i need it in grasshopper )

[help me pleasee .3dm](https://discourse.mcneel.com/uploads/short-url/8NH5DlYNOy6kxZ5qWAZQc5gPgRR.3dm) (49.3 KB)

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**Author:** ![Ali\_Najmaei](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/ali_najmaei/32/636031_2.png) [@Ali\_Najmaei](https://discourse.mcneel.com/u/Ali_Najmaei)\
**Post date:** [December 25, 2025, 10:54pm UTC](https://discourse.mcneel.com/t/problem-with-surface-from-points/213989/4 "2025-12-25T22:54:13Z")

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For this purpose I prefer to use `Curve Closest point` .  
And another thing is that your reference surface is Trimmed , so the `Divide Srf` result has nulls , and causes problem for `Surface from points` .  
As you can see this is how I managed to do that , `Untrim` the surface first and then in the end `Retrim` the deformed untrimmed surface to have the desired shape .

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/6/1/3/613b0595412847ddaa683f126516cbde9d69d2ac.png)  
 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/f/d/6/fd6540b8ea8b76f97bf70e3b65aafab52b5087f2.png)  
[Baran\_01.gh](https://discourse.mcneel.com/uploads/short-url/7RrGGmtCchibwbLWkhHIHOBdCMB.gh) (15.8 KB)

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<div class="post-metadata">

**Author:** ![baran](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/baran/32/717904_2.png) [@baran](https://discourse.mcneel.com/u/baran)\
**Post date:** [December 25, 2025, 11:01pm UTC](https://discourse.mcneel.com/t/problem-with-surface-from-points/213989/5 "2025-12-25T23:01:51Z")

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thank you i am looking to understand better

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<div class="post-metadata">

**Author:** ![Ali\_Najmaei](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/ali_najmaei/32/636031_2.png) [@Ali\_Najmaei](https://discourse.mcneel.com/u/Ali_Najmaei)\
**Post date:** [December 25, 2025, 11:11pm UTC](https://discourse.mcneel.com/t/problem-with-surface-from-points/213989/6 "2025-12-25T23:11:59Z")

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You’re welcome , please mark it as a solution if it’s solved .