diff --git a/scilpy/image/volume_space_management.py b/scilpy/image/volume_space_management.py
index 2a6846ca2..f28429168 100644
--- a/scilpy/image/volume_space_management.py
+++ b/scilpy/image/volume_space_management.py
@@ -443,7 +443,10 @@ def is_coordinate_in_bound(self, x, y, z, space, origin):
         self._validate_origin(origin)
         return super().is_coordinate_in_bound(x, y, z, space, origin)
 
-    # TODO: Figure out how to validate origin within vox_to_idx
+    @staticmethod
+    def vox_to_idx(x, y, z, origin):
+        raise NotImplementedError("FibertubeDataVolume is not compatible "
+                                  "with vox_to_idx operation.")
 
     def voxmm_to_idx(self, x, y, z, origin):
         self._validate_origin(origin)