The class mitkItkNonUniformBSpline was taken from an earlier ITK version (concering to file ITK 1.8) and slightly modified. The current master verion in ITK 4.3 itkNonUniformBSpline is deprecated. Currently, the mitkItkNonUniformBSpline is only used inside the virtual tracking device.
During the IGT-Hackfest there was a task to delete it, which was not possible due to major dependencies of the virtual tracking device.
If we want to remove this mitkItkNonUniformBSpline class, we have to re-implement the virtual tracking device and most of its functions.
This bug written by Thomas Kilgus with Alfreds Account.