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Hello,

I have a vtkImageData object that I write (with a XMLPImageDataWriter) every time step to a pvti file. Let's say for a 100 time steps. When I open the output_*.pvti files as a group, properties like X, Y, Z extent and range do not change as I animate over time (while in reality they do change).

And if I open the files individually (for example output_99.pvti) these properties are displayed correctly in ParaView. The problem appears when I open them as a group; it then keeps the properties of the first file.

Reproducer:

1. Untar growing_grid.tar.gz
2. In ParaView: Open... --> Select diffusion_grid_* as a group
3. Check the "Show data axis" checkbox in the properties
4. Play animation and observe that the grid (vtkImageData) is not growing (see red box in image)
5. Open... -> Select diffusion_grid_99 and observe that this is indeed larger than the last timestep of the previously opened object (see green box in image)

Does anyone else has this issue, and is there a way to solve this?

Cheers!

growing_grid.tar.gz