# \[Catalyst2\] Parallel definition of meshs

**URL:** https://discourse.paraview.org/t/catalyst2-parallel-definition-of-meshs/10098
**Category:** In Situ Support
**Created:** [August 3, 2022, 2:39pm UTC](https://discourse.paraview.org/t/catalyst2-parallel-definition-of-meshs/10098 "2022-08-03T14:39:14Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Nils](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/n/d6d6ee/32.png) [@Nils](https://discourse.paraview.org/u/Nils)
#### Post date: [August 3, 2022, 2:39pm UTC](https://discourse.paraview.org/t/catalyst2-parallel-definition-of-meshs/10098/1 "2022-08-03T14:39:14Z")

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Hi,  
I’m using the Catalyst V2 interface for insitu visualization. This works great if i only use one MPI process.  
On multiple MPI processes, every rank passes its part of the grid to catalyst. E.g. for a structured rectangle [-1,1] x [-1, 1] :  
rank 0:

```auto
catalyst:
  channels:
    example_grid:
      type: "mesh"
      data:
        coordsets:
          coords:
            type: uniform
            dims:
              i: 100
              j: 200
            origin:
              x: -1
              y: -1
              z: 0
            spacing:
              dx: 0.01
              dy: 0.01
              dz: 0
        topologies:
          mesh:
            type: "uniform"
            coordset: "coords"
        fields:
          example_field:
            association: "element"
            topology: "mesh"
            volume_dependent: "false"
            values: [...]

```

On rank 1 the same but with:

```auto
catalyst/channels/example_grid/data/coordsets/coords/origin/x: 0

```

In that setting ParaView obtains the correct data, but does not consider the parts of the grid as one object. E.g. `RescaleTransferFunctionToDataRange` scales the Data Range on each part separately.

What am i missing? I can’t find a way to pass the adjacency information to ParaView. I’ve found `adjsets` in the conduit mesh blueprint, but that seems to be ignored by paraview.  
I really appreciate your help!  
Thanks  
Nils