# XDMF reader failing to load matrix attribute

**URL:** <https://discourse.paraview.org/t/xdmf-reader-failing-to-load-matrix-attribute/17779>\
**Category:** ParaView Support\
**Created:** [October 30, 2026, 6:40pm UTC](https://discourse.paraview.org/t/xdmf-reader-failing-to-load-matrix-attribute/17779 "2026-10-30T18:40:41Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![SRudinsky](https://discourse.paraview.org/user_avatar/discourse.paraview.org/srudinsky/32/16572_2.png) [@SRudinsky](https://discourse.paraview.org/u/SRudinsky)\
**Post date:** [October 30, 2026, 6:40pm UTC](https://discourse.paraview.org/t/xdmf-reader-failing-to-load-matrix-attribute/17779/1 "2026-10-30T18:40:41Z")

</div>

I am using ParaView 6.2 and now matrix attributes are failing to load properly. I have a 2D array of data in an HDF5 file of size 10000 x 3. It’s defined in my XDMF file as follows.

```auto
<Attribute AttributeType="Matrix" Center="Node" Name="Attribute1">
        <DataItem Dimensions="10000 3" DataType="Float" Precision="8" Format="HDF">
          file.h5:/GroupName/Attribute1
        </DataItem>
</Attribute>

```

When I load the file and try to view the data array, ParaView freezes and the console outputs the following continuously for each row

`[paraview] vtkTable.cxx:429 ERR| vtkTable (0x223a5220): Column "Attribute1_0" must have 10000 rows, but has 1.`

I’ve verified the format in my HDF5 file and it is in fact a 2D array of 64-bit floats with 3 columns. I am using the standard XDMFreader. Loading Scalar attributes works fine.

Thanks,  
Sam