# Error in opening .vtm file

**URL:** https://discourse.paraview.org/t/error-in-opening-vtm-file/16689
**Category:** ParaView Support
**Tags:** vtk
**Created:** [May 21, 2025, 3:56pm UTC](https://discourse.paraview.org/t/error-in-opening-vtm-file/16689 "2025-05-21T15:56:25Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![mdev](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/m/45deac/32.png) [@mdev](https://discourse.paraview.org/u/mdev)
#### Post date: [May 21, 2025, 3:56pm UTC](https://discourse.paraview.org/t/error-in-opening-vtm-file/16689/1 "2025-05-21T15:56:25Z")

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Hello,

I have a problem in opening .vtm file which contains a .vtk file. I have an error message “could not create a reader for ~”. The .vtk file itself can be opened, but it is not readable through the .vtm file. I am wondering what the problem is.

Thank you.

[test\_vtm.vtm](https://discourse.paraview.org/uploads/short-url/hUdDfIjfSZvdlMCt8RTSuEpSwTu.vtm) (227 Bytes)  
[vtk\_in\_1.vtk](https://discourse.paraview.org/uploads/short-url/wPtjKCwCLyJsxjlx1KL9qQbShqE.vtk) (13.5 KB)

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<div class="post-metadata">

### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 21, 2025, 3:57pm UTC](https://discourse.paraview.org/t/error-in-opening-vtm-file/16689/2 "2025-05-21T15:57:48Z")

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.vtk in .vtm is not supported.  
use .vts XML format instead.