# when I create a ParaView Data file format file .pvd,how to choose reader

**URL:** https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623
**Category:** ParaView Support
**Created:** [July 15, 2021, 9:23am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623 "2021-07-15T09:23:55Z")
**Posts on this page:** 14
**Page:** 1

<div class="post-metadata">

### Author: ![sofeiya2021](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sofeiya2021/32/7148_2.png) [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)
#### Post date: [July 15, 2021, 9:23am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/1 "2021-07-15T09:23:55Z")

</div>

here is my temp.pvb file:

```auto
<?xml version="1.0"?>
<VTKFile version="0.1" compressor="vtkZLibDataCompressor" byte_order="BigEndian">
	<Collection>
		<DataSet timestep="0" group="" part="0" file="temperature0.vtu" />
		<DataSet timestep="1" group="" part="0" file="temperature1.vtu" />
		<DataSet timestep="2" group="" part="0" file="temperature2.vtu" />
		<DataSet timestep="3" group="" part="0" file="temperature3.vtu" />
		<DataSet timestep="4" group="" part="0" file="temperature4.vtu" />
	</Collection>
</VTKFile>

```

when I want open this pvb file on the Paraview GUI,it tell me choose one reader,and Try to select a lot of readers, but not display the pvb file correctly  
 ![choosePVBReader](https://discourse.paraview.org/uploads/default/original/2X/9/97378585bd1688cbdfbd0f9c202e51a63c2a2bc1.png)  
the temperature.vtu file can display correctly, it shows as follows:

 ![vtuone](https://discourse.paraview.org/uploads/default/original/2X/e/e773781cd86d3318a244475f796f0d3ff47b33ca.png)  
while reader should I pick?

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<div class="post-metadata">

### Author: ![nicolas.vuaille](https://discourse.paraview.org/user_avatar/discourse.paraview.org/nicolas.vuaille/32/5873_2.png) [@nicolas.vuaille](https://discourse.paraview.org/u/nicolas.vuaille)
#### Post date: [July 15, 2021, 11:32am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/2 "2021-07-15T11:32:38Z")

</div>

The correct extension is `pvd` and not pvb 🙂

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<div class="post-metadata">

### Author: ![sofeiya2021](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sofeiya2021/32/7148_2.png) [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)
#### Post date: [July 16, 2021, 3:38am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/3 "2021-07-16T03:38:57Z")

</div>

My file suffix is PVD, and the problem description text is wrong. the screenshot of Select

![choosePVBReader1](https://discourse.paraview.org/uploads/default/original/2X/8/8360d30cc67fda4ef0ed8a5b1cfab209b19cce95.png)  
the reader, which indicates that the file name is temperature.pvd

---

<div class="post-metadata">

### Author: ![nicolas.vuaille](https://discourse.paraview.org/user_avatar/discourse.paraview.org/nicolas.vuaille/32/5873_2.png) [@nicolas.vuaille](https://discourse.paraview.org/u/nicolas.vuaille)
#### Post date: [July 16, 2021, 7:16am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/4 "2021-07-16T07:16:49Z")

</div>

OK.

In the `Open file` dialog, can you select `ParaView Data File (*.pvd)` as “files of type” entry ?

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<div class="post-metadata">

### Author: ![Kenichiro-Yoshimi](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/k/ecc23a/32.png) [@Kenichiro-Yoshimi](https://discourse.paraview.org/u/Kenichiro-Yoshimi)
#### Post date: [July 16, 2021, 7:42am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/5 "2021-07-16T07:42:33Z")

</div>

It looks like the **type** attribute is missing.

```xml
<VTKFile type="Collection" version="0.1" compressor="vtkZLibDataCompressor" byte_order="BigEndian">

```

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<div class="post-metadata">

### Author: ![sofeiya2021](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sofeiya2021/32/7148_2.png) [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)
#### Post date: [July 16, 2021, 9:21am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/6 "2021-07-16T09:21:49Z")

</div>

the type is “Collection”

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<div class="post-metadata">

### Author: ![sofeiya2021](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sofeiya2021/32/7148_2.png) [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)
#### Post date: [July 16, 2021, 9:25am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/7 "2021-07-16T09:25:01Z")

</div>

After select `ParaView Data File (*.pvd)` as “files of type” entry when open the file, still pop up the choose reader window

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<div class="post-metadata">

### Author: ![nicolas.vuaille](https://discourse.paraview.org/user_avatar/discourse.paraview.org/nicolas.vuaille/32/5873_2.png) [@nicolas.vuaille](https://discourse.paraview.org/u/nicolas.vuaille)
#### Post date: [July 16, 2021, 9:30am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/8 "2021-07-16T09:30:39Z")

</div>

Can you share a file then please ?

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<div class="post-metadata">

### Author: ![sofeiya2021](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sofeiya2021/32/7148_2.png) [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)
#### Post date: [July 20, 2021, 2:00am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/9 "2021-07-20T02:00:36Z")

</div>

[temperature0.vtu](https://discourse.paraview.org/uploads/short-url/e0KamzPNEnZR1cHBiIqLUKSqt1b.vtu) (1.4 MB)

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<div class="post-metadata">

### Author: ![sofeiya2021](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sofeiya2021/32/7148_2.png) [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)
#### Post date: [July 22, 2021, 7:50am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/10 "2021-07-22T07:50:20Z")

</div>

temperature0.vtu is the file you want

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<div class="post-metadata">

### Author: ![sofeiya2021](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sofeiya2021/32/7148_2.png) [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)
#### Post date: [July 26, 2021, 12:18pm UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/11 "2021-07-26T12:18:05Z")

</div>

[temperature.pvd](https://discourse.paraview.org/uploads/short-url/24t2xvXVQdpYOo8x7wO5gZIIbc5.pvd) (489 Bytes)  
[temperature0.vtu](https://discourse.paraview.org/uploads/short-url/e0KamzPNEnZR1cHBiIqLUKSqt1b.vtu) (1.4 MB)  
[temperature1.vtu](https://discourse.paraview.org/uploads/short-url/nFa7ZRqzjKaxWIUk9lbxQov1iWI.vtu) (1.4 MB)  
[temperature2.vtu](https://discourse.paraview.org/uploads/short-url/rQhQwugsx4sB9UidbGoiQvFIUVT.vtu) (1.4 MB)  
[temperature3.vtu](https://discourse.paraview.org/uploads/short-url/qYRaIe9FhqLdXtuWqjfscXLzkaC.vtu) (1.4 MB)  
[temperature4.vtu](https://discourse.paraview.org/uploads/short-url/59i8OjiDnFMOLLkHEkfmWXgDTu2.vtu) (1.4 MB)

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<div class="post-metadata">

### Author: ![sofeiya2021](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sofeiya2021/32/7148_2.png) [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)
#### Post date: [July 26, 2021, 12:18pm UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/12 "2021-07-26T12:18:28Z")

</div>

this is all about temperature.pvd

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<div class="post-metadata">

### Author: ![Kenneth\_Moreland](https://discourse.paraview.org/user_avatar/discourse.paraview.org/kenneth_moreland/32/15033_2.png) [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [July 26, 2021, 12:53pm UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/13 "2021-07-26T12:53:03Z")

</div>

The `VTKFile` tag requires a `type="Collection"` attribute to be a valid pvd file. Making that change allows me to load the file.

[temperature.pvd](https://discourse.paraview.org/uploads/short-url/y0BxYdELhczy4leyDPGZ1QBPWmj.pvd) (507 Bytes)

```xml
<?xml version="1.0"?>
<VTKFile type="Collection" version="0.1" compressor="vtkZLibDataCompressor" byte_order="BigEndian">
	<Collection>
		<DataSet timestep="0" group="" part="0" file="temperature0.vtu" />
		<DataSet timestep="1" group="" part="0" file="temperature1.vtu" />
		<DataSet timestep="2" group="" part="0" file="temperature2.vtu" />
		<DataSet timestep="3" group="" part="0" file="temperature3.vtu" />
		<DataSet timestep="4" group="" part="0" file="temperature4.vtu" />
	</Collection>
</VTKFile>

```

---

<div class="post-metadata">

### Author: ![sofeiya2021](https://discourse.paraview.org/user_avatar/discourse.paraview.org/sofeiya2021/32/7148_2.png) [@sofeiya2021](https://discourse.paraview.org/u/sofeiya2021)
#### Post date: [July 28, 2021, 8:26am UTC](https://discourse.paraview.org/t/when-i-create-a-paraview-data-file-format-file-pvd-how-to-choose-reader/7623/14 "2021-07-28T08:26:08Z")

</div>

thanks very much,after add the type=“Collection” \*.pvd file can be opened by paraview.  
but it doesn’t display as animation