# Surface by loft

**URL:** <https://forum.dynamobim.com/t/surface-by-loft/92913>\
**Category:** Uncategorized\
**Tags:** dynamo\
**Created:** [August 16, 2023, 9:03am UTC](https://forum.dynamobim.com/t/surface-by-loft/92913 "2023-08-16T09:03:38Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![adeleh7019](https://avatars.discourse-cdn.com/v4/letter/a/258eb7/32.png) [@adeleh7019](https://forum.dynamobim.com/u/adeleh7019)\
**Post date:** [August 16, 2023, 9:03am UTC](https://forum.dynamobim.com/t/surface-by-loft/92913/1 "2023-08-16T09:03:38Z")

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![Home_2023-08-16_12-13-23](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/f/a/fa6a6b0bef0eed15496f15cf8b7c4a11c9d69b90.png)

hello everybody  
I create this code but I get this error. can you help me?

Warning: Surface.ByLoft operation failed. Unable to loft! : BAD\_UV\_SKIN\_DIR – Surface U and V derivatives are in the same or opposite direction.

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**Author:** ![sovitek](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/sovitek/32/116237_2.png) [@sovitek](https://forum.dynamobim.com/u/sovitek)\
**Post date:** [August 16, 2023, 9:36am UTC](https://forum.dynamobim.com/t/surface-by-loft/92913/2 "2023-08-16T09:36:51Z")

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Hi @adeleh7019 and welcome here…could you share your dyn ?

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**Author:** ![adeleh7019](https://avatars.discourse-cdn.com/v4/letter/a/258eb7/32.png) [@adeleh7019](https://forum.dynamobim.com/u/adeleh7019)\
**Post date:** [August 16, 2023, 9:55am UTC](https://forum.dynamobim.com/t/surface-by-loft/92913/3 "2023-08-16T09:55:50Z")

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> **[Home](https://www.mediafire.com/file/amqrnj284bjhzle/Home.dyn/file)**
>
> MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.

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**Author:** ![Kai](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Kai](https://forum.dynamobim.com/u/Kai)\
**Post date:** [August 16, 2023, 11:16pm UTC](https://forum.dynamobim.com/t/surface-by-loft/92913/4 "2023-08-16T23:16:29Z")

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@adeleh7019 ,  
not entirely sure end goal but if you change this to @l2 loft should work.

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/4/d/4d85458a91966258c4b8a2cc9d16e5bf3b9d46a8.png)  
Cheers KS