# ADIOS2 .bp file error in ParaView (Windows) with DFG 2D-3 tutorial

**URL:** https://fenicsproject.discourse.group/t/adios2-bp-file-error-in-paraview-windows-with-dfg-2d-3-tutorial/17473
**Category:** General
**Tags:** io, dolfinx
**Created:** [April 19, 2025, 4:56pm UTC](https://fenicsproject.discourse.group/t/adios2-bp-file-error-in-paraview-windows-with-dfg-2d-3-tutorial/17473 "2025-04-19T16:56:13Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![CFEnics](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/cfenics/32/8327_2.png) [@CFEnics](https://fenicsproject.discourse.group/u/CFEnics)
#### Post date: [April 19, 2025, 4:56pm UTC](https://fenicsproject.discourse.group/t/adios2-bp-file-error-in-paraview-windows-with-dfg-2d-3-tutorial/17473/1 "2025-04-19T16:56:13Z")

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Hi,  
I’m running the **Test problem 2: Flow past a cylinder (DFG 2D-3 benchmark)** from the FEniCSx tutorials and writing output using `VTXWriter` in `.bp` format.

At the final steps of the simulation, when trying to open the `.bp` files in **ParaView on Windows** , I get the following error:

```auto
ERROR: In vtkADIOS2VTXReader.cxx, line 99
vtkADIOS2VTXReader (00000223A899C4C0): Error loading ADIOS2 schema: e[1;36m[Sat Apr 19 18:50:35 2025]e[1;34m [ADIOS2 EXCEPTION]e[0m <Toolkit> <transport::file::FilePOSIX> <Read> : couldn't move to start position 7428431622 in file C:\Users\celia\dfg2D-3-u.bp\data.0 : errno = 22: Invalid argumente[0m
: iostream stream error

ERROR: In vtkExecutive.cxx, line 730
vtkPVCompositeDataPipeline (00000223A89AFD80): Algorithm vtkADIOS2VTXReader (00000223A899C4C0) returned failure for request: vtkInformation (00000223BA7DD250)
  Debug: Off
  Modified Time: 1335439
  Reference Count: 1
  Registered Events: (none)
  Request: REQUEST_DATA
  FORWARD_DIRECTION: 0
  ALGORITHM_AFTER_FORWARD: 1
  FROM_OUTPUT_PORT: 0

```

I would still like to find a way to make it work properly on Windows, if possible.  
Does anyone know the cause?  
Thanks!

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<div class="post-metadata">

### Author: ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)
#### Post date: [April 24, 2025, 8:44pm UTC](https://fenicsproject.discourse.group/t/adios2-bp-file-error-in-paraview-windows-with-dfg-2d-3-tutorial/17473/2 "2025-04-24T20:44:10Z")

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This seems like a Paraview issue, see: [Paraview does not work with VTXWriter on 3rd order elements - #4 by Ignatii](https://fenicsproject.discourse.group/t/paraview-does-not-work-with-vtxwriter-on-3rd-order-elements/17143/4) for a workaround .