# Legacy PolyData File Compatibility

**URL:** https://discourse.vtk.org/t/legacy-polydata-file-compatibility/5354
**Category:** Support
**Created:** [March 9, 2021, 8:53pm UTC](https://discourse.vtk.org/t/legacy-polydata-file-compatibility/5354 "2021-03-09T20:53:08Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![will.schroeder](https://discourse.vtk.org/user_avatar/discourse.vtk.org/will.schroeder/32/233_2.png) [@will.schroeder](https://discourse.vtk.org/u/will.schroeder)
#### Post date: [March 9, 2021, 8:58pm UTC](https://discourse.vtk.org/t/legacy-polydata-file-compatibility/5354/2 "2021-03-09T20:58:32Z")

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VTK master has a recent change so that you can write out either VTK 4.2 or 5.1 formats:  
[https://discourse.vtk.org/t/can-we-write-out-the-old-vtk-4-2-file-format-with-vtk-9/5066](https://discourse.vtk.org/t/can-we-write-out-the-old-vtk-4-2-file-format-with-vtk-9/5066)

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_[View the full topic](https://discourse.vtk.org/t/legacy-polydata-file-compatibility/5354)._