# HyperTreeGrid .series

**URL:** https://discourse.paraview.org/t/hypertreegrid-series/14444
**Category:** ParaView Support
**Created:** [April 20, 2024, 1:34am UTC](https://discourse.paraview.org/t/hypertreegrid-series/14444 "2024-04-20T01:34:57Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![omdaniel](https://discourse.paraview.org/user_avatar/discourse.paraview.org/omdaniel/32/13877_2.png) [@omdaniel](https://discourse.paraview.org/u/omdaniel)
#### Post date: [April 20, 2024, 1:34am UTC](https://discourse.paraview.org/t/hypertreegrid-series/14444/1 "2024-04-20T01:34:57Z")

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I built a HyperTreeGrid with vtk and would like to import a set of htg files in time; however, htg files doesn’t seem to support the same .series extension as other files and while vtkXMLHyperTreeGridWriter has a WriteNextTime method, it crashes when I try to write a time aware htg

writer = vtkXMLHyperTreeGridWriter()  
writer.SetInputData(htg)  
writer.SetFileName(‘simple\_jet.htg’)  
writer.SetDataModeToBinary()  
writer.SetWriteTimeValue(True)  
writer.SetNumberOfTimeSteps(2)  
writer.SetDebug(True)  
writer.Start()  
writer.WriteNextTime(0.01)  
writer.WriteNextTime(0.02)  
writer.Stop()

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [April 22, 2024, 7:30am UTC](https://discourse.paraview.org/t/hypertreegrid-series/14444/2 "2024-04-22T07:30:05Z")

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I’m afraid the HTG reader doesnt support .series file, though it could be added quite easily.

FYI: @Charles_Gueunet