# The mesh does not seem to move
**URL:** https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709
**Category:** Development
**Tags:** vtk
**Created:** [March 15, 2021, 4:07pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709 "2021-03-15T16:07:44Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@fraonez](https://discourse.paraview.org/u/fraonez)
#### Post date: [March 15, 2021, 4:07pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/1 "2021-03-15T16:07:44Z")
Hi, my name is Joaquin.
I am doing a wear test on a mining truck hopper, when the discharge occurs, the graphic representation of the mesh does not seem to move, instead the particles do discharge from the hopper.
I appreciate the help you can give me.
Attached entry script from LIGGGHTS[esferas.liggghts](https://discourse.paraview.org/uploads/short-url/hYCI7NmSTuCfur0WzHS3Wiw1O3D.liggghts) (12.5 KB)
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [March 15, 2021, 4:10pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/2 "2021-03-15T16:10:41Z")
which part of your data are you expecting to move but doesn’t ?
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### Author:  [@fraonez](https://discourse.paraview.org/u/fraonez)
#### Post date: [March 15, 2021, 4:13pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/3 "2021-03-15T16:13:20Z")
the hopper, in the script the file name is “tolvafinal”
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [March 15, 2021, 4:18pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/4 "2021-03-15T16:18:10Z")
So I suppose it corresponds to the tolva.vtk in the pipeline browser ?
In that case, this is expected as this data format does not support timesteps outside of file series.
You have to check if you simulation generated multiple .vtk files.
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### Author:  [@fraonez](https://discourse.paraview.org/u/fraonez)
#### Post date: [March 15, 2021, 4:23pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/5 "2021-03-15T16:23:22Z")
sorry, that was the file.
only one tolva.vtk file was generated
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [March 15, 2021, 4:24pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/6 "2021-03-15T16:24:40Z")
Then ParaView can’t make it move as this information is not present on the data.
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### Author:  [@fraonez](https://discourse.paraview.org/u/fraonez)
#### Post date: [March 15, 2021, 4:29pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/7 "2021-03-15T16:29:45Z")
i understand…so my problem is in my script.
i will try to fix, thanks for your help Mathieu 😀
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### Author:  [@fraonez](https://discourse.paraview.org/u/fraonez)
#### Post date: [March 15, 2021, 5:59pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/8 "2021-03-15T17:59:32Z")
sorry mathieu, but i cant solve the problem.
i have to change the dumpsteps ??
im really new in this.
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### Author:  [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [March 15, 2021, 6:43pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/9 "2021-03-15T18:43:44Z")
I think this question is more about how to use LIGGGHTS and not how to use ParaView. I for one know nothing about LIGGGHTS and most of the participants of this discourse channel also know nothing about it.
I did some Google searches on the LIGGGHTS documentation, and I think the problem is with the `dump` command on line 296 of your script. Here is a small excerpt from [the dump documentation](https://www.cfdem.com/media/DEM/docu/dump.html):
> This dump is especially useful if a [_fix move/mesh_](https://www.cfdem.com/media/DEM/docu/fix_move_mesh.html) is registered. If the position of the mesh is changed over time and you want to dump one file for each dump timestep for post-processing together with the particle data, you should use a filename like ‘mydumpfile\*.stl’. Note: This series of files can then be post-processed together with the particle dump file converted to VTK in Paraview
So, I think if you change the filename from `postesferas/tolva.vtk` to `postesferas/tolva*.vtk`, then LIGGGHTS should write out multiple files for the hopper that will represent how it moves through time.
If that does not work, I suggest contacting the LIGGGHTS support. They should be able to help better than us.
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### Author:  [@fraonez](https://discourse.paraview.org/u/fraonez)
#### Post date: [March 15, 2021, 8:51pm UTC](https://discourse.paraview.org/t/the-mesh-does-not-seem-to-move/6709/10 "2021-03-15T20:51:12Z")
Even though you don’t know about the subject, you help me, thank you very much for your help, you are the best.