# Problem with writing data into stl
**URL:** https://discourse.paraview.org/t/problem-with-writing-data-into-stl/1628
**Category:** ParaView Support
**Created:** [April 8, 2019, 4:28pm UTC](https://discourse.paraview.org/t/problem-with-writing-data-into-stl/1628 "2019-04-08T16:28:57Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Jonhatan\_Lorenzo](https://discourse.paraview.org/u/Jonhatan_Lorenzo)
#### Post date: [April 8, 2019, 4:28pm UTC](https://discourse.paraview.org/t/problem-with-writing-data-into-stl/1628/1 "2019-04-08T16:28:57Z")
Dear Team,
I am trying to write a stl file with the Wall shear stress. I read that it is possible with paraview. First it is necessary to extract the surface and then triangulate it. I have done both steps and in the data of both I can see the Wall Shear stress and other variables. However, once I save the data as stl I can only see the geometry and the cellNormals, but the Wall shear stress and other variables are gone. Could you guys provide me with some information?
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [April 10, 2019, 8:18am UTC](https://discourse.paraview.org/t/problem-with-writing-data-into-stl/1628/2 "2019-04-10T08:18:53Z")
Can you provide an example dataset ?
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### Author:  [@Michael](https://discourse.paraview.org/u/Michael)
#### Post date: [April 10, 2019, 10:07am UTC](https://discourse.paraview.org/t/problem-with-writing-data-into-stl/1628/3 "2019-04-10T10:07:22Z")
As far as I know, the STL format does not support point data or cell data (other than normals).
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### Author:  [@Jonhatan\_Lorenzo](https://discourse.paraview.org/u/Jonhatan_Lorenzo)
#### Post date: [April 12, 2019, 7:57am UTC](https://discourse.paraview.org/t/problem-with-writing-data-into-stl/1628/4 "2019-04-12T07:57:05Z")
Dear Michael,
I also realized of my mistake, I created vtp files which contain the information of the surface!
Best Regards,
Jonhatan