Error in opening .vtm file

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 (227 Bytes)
vtk_in_1.vtk (13.5 KB)

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