# Paraview
**URL:** https://discourse.paraview.org/t/paraview/2900
**Category:** ParaView Support
**Created:** [November 4, 2019, 3:28pm UTC](https://discourse.paraview.org/t/paraview/2900 "2019-11-04T15:28:44Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [November 4, 2019, 3:28pm UTC](https://discourse.paraview.org/t/paraview/2900/1 "2019-11-04T15:28:44Z")
Hi everyone,
I faced a problem in Paraview. when I am running the tutorials in OpenFoam and I want to see them in paraview when I use reconstructed case it will show me the geometry but when I use Decomposed case there is nothing to show me. I don’t know what is wrong. could you please help me .
kind regards,
Arghavan
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [November 4, 2019, 3:30pm UTC](https://discourse.paraview.org/t/paraview/2900/2 "2019-11-04T15:30:58Z")
The case can’t be reconstructed and decomposed at the same time afaik.
Edit : not true, the case cannot be decomposed and not reconstructed at the same time.
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### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [November 4, 2019, 3:37pm UTC](https://discourse.paraview.org/t/paraview/2900/3 "2019-11-04T15:37:00Z")
Thanks. I know I am working with Paraview everyday and I have never been faced with this problem.even first I choose decomposed case and I waite for some while but I cannot receive any thing to visualize.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [November 4, 2019, 3:42pm UTC](https://discourse.paraview.org/t/paraview/2900/4 "2019-11-04T15:42:20Z")
maybe this must be configured in the OpenFOAM side.
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### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [November 4, 2019, 3:45pm UTC](https://discourse.paraview.org/t/paraview/2900/5 "2019-11-04T15:45:48Z")
maybe. I have checked the decomposeParDict and all different methods for processors are active.
thanks .
> [@mwestphal](#):
>
> maybe this must be configured in the OpenFOAM side.
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### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [November 4, 2019, 3:53pm UTC](https://discourse.paraview.org/t/paraview/2900/6 "2019-11-04T15:53:13Z")
nothing changed, I can see the polymesh folder and logfiles but still is not coming in paraview
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### Author:  [@Arghavanizad](https://discourse.paraview.org/u/Arghavanizad)
#### Post date: [November 4, 2019, 4:24pm UTC](https://discourse.paraview.org/t/paraview/2900/7 "2019-11-04T16:24:16Z")
it is written case.foam contain no time steps, while I have the folders of results of time steps . Do you know why it is like this ?
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### Author:  [@olesenm](https://discourse.paraview.org/u/olesenm)
#### Post date: [November 6, 2019, 2:53pm UTC](https://discourse.paraview.org/t/paraview/2900/8 "2019-11-06T14:53:39Z")
Not a problem to have both serial and parallel data/meshes. In the simplest case, you’d have blockMesh (serial) as the background for snappyHexMesh, which you could then run in parallel.
Can always use reconstructPar (or reconstructParMesh) to collect as a serial case, and decomposePar to go there other way.
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### Author:  [@olesenm](https://discourse.paraview.org/u/olesenm)
#### Post date: [November 6, 2019, 2:54pm UTC](https://discourse.paraview.org/t/paraview/2900/9 "2019-11-06T14:54:44Z")
The `.foam` file is just an indicator which reader should be used (ParaView hooks into the file extension). The file can have any content (including none).
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### Author:  [@olesenm](https://discourse.paraview.org/u/olesenm)
#### Post date: [November 6, 2019, 2:57pm UTC](https://discourse.paraview.org/t/paraview/2900/10 "2019-11-06T14:57:16Z")
The existence of decomposeParDict and any of its contents do not matter for the paraview reader. It only examines the file-system. Note that if you are using the OpenFOAM collocated output (which has processors/ instead of processor[0-9]\*/ directories), you are out of luck. The builtin reader does not yet handle those.