# How to output the vtk DataFile Version 3.0
**URL:** https://discourse.vtk.org/t/how-to-output-the-vtk-datafile-version-3-0/6354
**Category:** Support
**Tags:** file-formats
**Created:** [August 11, 2021, 9:33am UTC](https://discourse.vtk.org/t/how-to-output-the-vtk-datafile-version-3-0/6354 "2021-08-11T09:33:39Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@kingui1106](https://discourse.vtk.org/u/kingui1106)
#### Post date: [August 11, 2021, 9:33am UTC](https://discourse.vtk.org/t/how-to-output-the-vtk-datafile-version-3-0/6354/1 "2021-08-11T09:33:39Z")
I am use the vtk 9.0.1.
I use vtkDataSetWriter to out put vtk file.And i get the # vtk DataFile Version 5.1.
Is any way to output vtk DataFile Version 3.0.
Thanks!!!
···
vtkNew writer;
writer-\>SetFileName(filename);
writer-\>SetInputData(polydata);
writer-\>Update();
···
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [August 11, 2021, 9:41am UTC](https://discourse.vtk.org/t/how-to-output-the-vtk-datafile-version-3-0/6354/2 "2021-08-11T09:41:51Z")
@will.schroeder ?
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### Author:  [@will.schroeder](https://discourse.vtk.org/u/will.schroeder)
#### Post date: [August 11, 2021, 10:46am UTC](https://discourse.vtk.org/t/how-to-output-the-vtk-datafile-version-3-0/6354/3 "2021-08-11T10:46:25Z")
That could be added to the writer, but currently the functionality does not exist. Right now SetFileVersion(VTK\_LEGACY\_READER\_VERSION\_4\_2) is the oldest supported. You might try the 4.2 version, I don’t think the format changed much between 3.0 and 4.2, although we’d have to deep dive to understand exactly what changed.
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### Author:  [@kingui1106](https://discourse.vtk.org/u/kingui1106)
#### Post date: [August 12, 2021, 1:22am UTC](https://discourse.vtk.org/t/how-to-output-the-vtk-datafile-version-3-0/6354/4 "2021-08-12T01:22:04Z")
Thanks!!But I can’t find SetFileVersion() in the vtk version 9.0.1 and 9.0.3
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [August 12, 2021, 8:09am UTC](https://discourse.vtk.org/t/how-to-output-the-vtk-datafile-version-3-0/6354/5 "2021-08-12T08:09:06Z")
This is present in master, not in any release yet.
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### Author:  [@kingui1106](https://discourse.vtk.org/u/kingui1106)
#### Post date: [August 18, 2021, 3:16am UTC](https://discourse.vtk.org/t/how-to-output-the-vtk-datafile-version-3-0/6354/6 "2021-08-18T03:16:23Z")
Thanks！！