# VTK files appear as series in file loader, but are separated when loeaded in.

**URL:** https://discourse.paraview.org/t/vtk-files-appear-as-series-in-file-loader-but-are-separated-when-loeaded-in/12196
**Category:** ParaView Support
**Tags:** vtk
**Created:** [May 31, 2023, 11:39am UTC](https://discourse.paraview.org/t/vtk-files-appear-as-series-in-file-loader-but-are-separated-when-loeaded-in/12196 "2023-05-31T11:39:28Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![bloop](https://discourse.paraview.org/user_avatar/discourse.paraview.org/bloop/32/11726_2.png) [@bloop](https://discourse.paraview.org/u/bloop)
#### Post date: [May 31, 2023, 11:39am UTC](https://discourse.paraview.org/t/vtk-files-appear-as-series-in-file-loader-but-are-separated-when-loeaded-in/12196/1 "2023-05-31T11:39:28Z")

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So I’m running a simulation using LIGGGHTS which outputs the solution as VTK files. When I open the file loader in Paraview 5.11.1, the files appear as a series, but when loaded in, they seem separated. I think this is the cause of the extreme loading time. What did I do wrong?

 ![image](https://discourse.paraview.org/uploads/default/original/2X/a/a1c3658f8457ff8ad6156b567b1e022edc8c297d.png)

 ![image](https://discourse.paraview.org/uploads/default/original/2X/1/189d05d25c8707198db52eb27e1dc407cd313fa8.png)

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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: [May 31, 2023, 11:42am UTC](https://discourse.paraview.org/t/vtk-files-appear-as-series-in-file-loader-but-are-separated-when-loeaded-in/12196/2 "2023-05-31T11:42:08Z")

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Hi @bloop

Please share some files to reproduce the issue.

Best,

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### Author: ![bloop](https://discourse.paraview.org/user_avatar/discourse.paraview.org/bloop/32/11726_2.png) [@bloop](https://discourse.paraview.org/u/bloop)
#### Post date: [May 31, 2023, 11:50am UTC](https://discourse.paraview.org/t/vtk-files-appear-as-series-in-file-loader-but-are-separated-when-loeaded-in/12196/3 "2023-05-31T11:50:41Z")

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Hi @mwestphal, I was tinkering around and discovered that it was a file naming issue.

 ![image](https://discourse.paraview.org/uploads/default/original/2X/6/6c7823d98688e3854f1605f95afb6f5c21c17812.png)

 ![image](https://discourse.paraview.org/uploads/default/original/2X/a/a296dcf812924c567d3766d0783e03a125aaa5cc.png)

Apparently the naming has to be foo\_N.vtk as opposed to fooN.vtk which I used for the other elements of the simulation.

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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: [May 31, 2023, 11:54am UTC](https://discourse.paraview.org/t/vtk-files-appear-as-series-in-file-loader-but-are-separated-when-loeaded-in/12196/4 "2023-05-31T11:54:53Z")

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Looks like a bug. If the dialog show it as a timeseries, it should open as a time series. Could you open an issue: [https://gitlab.kitware.com/paraview/paraview/-/issues](https://gitlab.kitware.com/paraview/paraview/-/issues) ?

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### Author: ![bloop](https://discourse.paraview.org/user_avatar/discourse.paraview.org/bloop/32/11726_2.png) [@bloop](https://discourse.paraview.org/u/bloop)
#### Post date: [May 31, 2023, 2:32pm UTC](https://discourse.paraview.org/t/vtk-files-appear-as-series-in-file-loader-but-are-separated-when-loeaded-in/12196/5 "2023-05-31T14:32:17Z")

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Sure thing.

Here’s the link:  
[When using file name format fooN.vtk, “Open” shows VTK file series as group, but loads it as multiple groups instead. (#22158) · Issues · ParaView / ParaView · GitLab (kitware.com)](https://gitlab.kitware.com/paraview/paraview/-/issues/22158)