# SPH Volume Interpolation filter not updating at new timesteps
**URL:** https://discourse.paraview.org/t/sph-volume-interpolation-filter-not-updating-at-new-timesteps/15208
**Category:** ParaView Support
**Created:** [August 12, 2024, 3:42am UTC](https://discourse.paraview.org/t/sph-volume-interpolation-filter-not-updating-at-new-timesteps/15208 "2024-08-12T03:42:41Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Nadun\_19](https://discourse.paraview.org/u/Nadun_19)
#### Post date: [August 12, 2024, 3:42am UTC](https://discourse.paraview.org/t/sph-volume-interpolation-filter-not-updating-at-new-timesteps/15208/1 "2024-08-12T03:42:41Z")
Hello,
I am having a issue using the SPH Volume Interpolation filter for a sph dataset overtime. This filter does not seem to update at each timestep and I have to manually refresh the filter.
I am using Paraview 5.13.0-RC1.
Thanks,
Nadun
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [August 22, 2024, 10:27pm UTC](https://discourse.paraview.org/t/sph-volume-interpolation-filter-not-updating-at-new-timesteps/15208/2 "2024-08-22T22:27:07Z")
Welcome to ParaView, @Nadun_19 . I tried this out on some example time series data and the **SPH Volume Interpolation** seemed to update as expected.
Could you possibly share an example dataset and the pipeline you are using that shows this behavior?
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### Author:  [@Nadun\_19](https://discourse.paraview.org/u/Nadun_19)
#### Post date: [August 23, 2024, 1:36am UTC](https://discourse.paraview.org/t/sph-volume-interpolation-filter-not-updating-at-new-timesteps/15208/3 "2024-08-23T01:36:25Z")
I am using a LAMMPS dump file (attached below)
[https://www.dropbox.com/scl/fi/i67w865tp1mfvnvkzw8vx/stomach\_deform.dump?rlkey=ggtv4d4xguenij2bcu65xbwpc&st=7r1f9d4o&dl=0](https://www.dropbox.com/scl/fi/i67w865tp1mfvnvkzw8vx/stomach_deform.dump?rlkey=ggtv4d4xguenij2bcu65xbwpc&st=7r1f9d4o&dl=0)
It is a Multi-block Dataset (Polygonal Mesh) with 11 time steps.
When I apply the SPHVolumeInterpolator filter and look at the information tab the number of timesteps is zero.
I have attached my paraview state file:
[sph\_interpolation\_paraview.pvsm](https://discourse.paraview.org/uploads/short-url/mtkCLMy8f2RB8PEGriIB9lDnw1q.pvsm) (718.6 KB)
If you step through the timesteps the slice with the velocity magnitude does not change, but if I manually re-do the SPHVolumeInterpolator filter the slice visually updates for that timestep.
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### Author:  [@Nadun\_19](https://discourse.paraview.org/u/Nadun_19)
#### Post date: [September 10, 2024, 10:47pm UTC](https://discourse.paraview.org/t/sph-volume-interpolation-filter-not-updating-at-new-timesteps/15208/4 "2024-09-10T22:47:30Z")
Hi @cory.quammen just following up in regards to this!
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [June 9, 2025, 5:38pm UTC](https://discourse.paraview.org/t/sph-volume-interpolation-filter-not-updating-at-new-timesteps/15208/5 "2025-06-09T17:38:11Z")
I can confirm the SPH Volume Interpolation as added to the shared state file does not work.
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [June 9, 2025, 5:44pm UTC](https://discourse.paraview.org/t/sph-volume-interpolation-filter-not-updating-at-new-timesteps/15208/6 "2025-06-09T17:44:50Z")
Issue to track this bug is here: [https://gitlab.kitware.com/paraview/paraview/-/issues/23000](https://gitlab.kitware.com/paraview/paraview/-/issues/23000)