[vtkusers] label:xdmfbasic_string::_S_construct NULL not valid

[Dominik Szczerba]

Hi,

When writing a vtkImageData with the latest git Xdmf writer I get this error:

label:xdmfbasic_string::_S_construct NULL not valid

If I use an vtkXMLImageDataWriter there are no problems. Do I need to
specify some extra stuff in the writer? I am just resampling an image
and want to save it.

Thanks for any hints.

Dominik