/usr/lib/x86_64-linux-gnu/libvtkViewsContext2DTCL.so is in tcl-vtk6 6.0.0-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libvtkViewsContextIIDTCL-6.0.so
/usr/lib/x86_64-linux-gnu/libvtkViewsContextIIDTCL-6.0.so