When using the TransformixImageFilter from SimpleElastix to register 4D images, I get the issue

sitk::ERROR: TransformixImageFilter does not support the combination of image type short and dimension 4. This a serious error. Contact developers at https://github.com/kaspermarstal/SimpleElastix/issues.

The error is not fixed by setting SITK_MAX_DIMENSIONS=4 during compilation, which should allow for images of dimension 4 in the Transformix filter (https://github.com/SimpleITK/SimpleITK/blame/a62598f93867214a317fd9ea4d5acc11fac754c8/Code/ElastixTransformixWrappers/src/sitkTransformixImageFilterImpl.cxx#L128)

Is it intended to have this flag in addition to the SimpleITK_MAX_DIMENSION flag? I understand that SITK_MAX_DIMENSIONS was added as a response to #1891, but having these two flags is confusing to me.

I am using SimpleITK version 2.3rc1, built with SimpleElastix using the conda recipe (https://github.com/kaftanski/SimpleITKCondaRecipe-Elastix).