# Excel coordinates to Revit Toposurface

**URL:** <https://forum.dynamobim.com/t/excel-coordinates-to-revit-toposurface/36497>\
**Category:** Revit\
**Tags:** revit, excel\
**Created:** [May 28, 2019, 9:59pm UTC](https://forum.dynamobim.com/t/excel-coordinates-to-revit-toposurface/36497 "2019-05-28T21:59:25Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Arnu84](https://avatars.discourse-cdn.com/v4/letter/a/5daacb/32.png) [@Arnu84](https://forum.dynamobim.com/u/Arnu84)\
**Post date:** [May 28, 2019, 9:59pm UTC](https://forum.dynamobim.com/t/excel-coordinates-to-revit-toposurface/36497/1 "2019-05-28T21:59:25Z")

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Hi guys. Need help. I am new to Dynamo … (Started this morning)  
I have spent allot of time today on you tube & Dynamo dictionary & Primer…I have created my own script to convert my coordinates from excel and transform it to revit toposurface via Dynamo and Excel sheet.  
But for some reason i still get a error of “Warning: Asked to convert non-convertible types”…  
Can someone please tell me what i am doing wrong.?

 ![Excel%20to%20Toposurface](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/c/6/c6afa17b8bb58d046553a6fd324f2283e97b507b.png) [Excel to Toposurface.dyn](https://forum.dynamobim.com/uploads/short-url/c5Cc3u3kWT497NDB63WbwqzuXOJ.dyn) (12.5 KB)  
 ![Excel%20to%20Toposurface](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/c/6/c6afa17b8bb58d046553a6fd324f2283e97b507b.png)

Thank you

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**Author:** ![Arnu84](https://avatars.discourse-cdn.com/v4/letter/a/5daacb/32.png) [@Arnu84](https://forum.dynamobim.com/u/Arnu84)\
**Post date:** [May 28, 2019, 10:01pm UTC](https://forum.dynamobim.com/t/excel-coordinates-to-revit-toposurface/36497/2 "2019-05-28T22:01:54Z")

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Here is the excel file…

[Site 200x200.xlsx](https://forum.dynamobim.com/uploads/short-url/2gEBBKdQwaJA0crKR1fYySvZ6lJ.xlsx) (633.5 KB)

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**Author:** ![SeanP](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/seanp/32/42560_2.png) [@SeanP](https://forum.dynamobim.com/u/SeanP)\
**Post date:** [May 29, 2019, 12:32am UTC](https://forum.dynamobim.com/t/excel-coordinates-to-revit-toposurface/36497/3 "2019-05-29T00:32:59Z")

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Please give us the previews as well as the “error” messages on the String.toNumber. My guess is there are nulls, empty strings, or a number that isn’t coming in from excel correctly.

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**Author:** ![Arnu84](https://avatars.discourse-cdn.com/v4/letter/a/5daacb/32.png) [@Arnu84](https://forum.dynamobim.com/u/Arnu84)\
**Post date:** [May 29, 2019, 9:43am UTC](https://forum.dynamobim.com/t/excel-coordinates-to-revit-toposurface/36497/5 "2019-05-29T09:43:57Z")

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Hi Jbo

Thank you very much for the help… It is working now…  
I am still not sure how everything works… but i am sure i will learn as i experiment further.

Thank you once again for the help…

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**Author:** ![break113](https://avatars.discourse-cdn.com/v4/letter/b/ea666f/32.png) [@break113](https://forum.dynamobim.com/u/break113)\
**Post date:** [July 25, 2024, 9:11pm UTC](https://forum.dynamobim.com/t/excel-coordinates-to-revit-toposurface/36497/6 "2024-07-25T21:11:49Z")

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hey mate,

what was the mistake ?

cheers