diff --git a/doc/source/tutorials/02-recording-animal-trajectory.ipynb b/doc/source/tutorials/02-recording-animal-trajectory.ipynb
index 9cd0c0ad039818f2638930cfe0d274bba87fe375..e04c035bdce47c76830fc81df8837ff17446d25d 100644
--- a/doc/source/tutorials/02-recording-animal-trajectory.ipynb
+++ b/doc/source/tutorials/02-recording-animal-trajectory.ipynb
@@ -694,7 +694,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.3"
+   "version": "3.6.6"
   }
  },
  "nbformat": 4,
diff --git a/navipy/processing/pcode.py b/navipy/processing/pcode.py
index 41d7220176db6486a13d8a6f12dae6ca8bbe7fdf..f0d4371c05d902861a6e2cc93a8fc281fd2773c2 100644
--- a/navipy/processing/pcode.py
+++ b/navipy/processing/pcode.py
@@ -134,16 +134,14 @@ def pcv(place_code, viewing_directions):
                        should be 1'.format(place_code.shape[component_dim]))
     elevation = viewing_directions[..., __spherical_indeces__['elevation']]
     azimuth = viewing_directions[..., __spherical_indeces__['azimuth']]
-    if (np.any(elevation < -np.pi / 2) or np.any(elevation > np.pi / 2)):
-        # if (np.any(elevation < -2*np.pi) or np.any(elevation > 2*np.pi)):
-        raise ValueError(" Elevation must be radians in range [-2*pi;2*pi]")
-    if (np.max(elevation) - np.min(elevation) > 2 * np.pi):
+    if (np.any(elevation <= -np.pi) or np.any(elevation >= np.pi)):
+        raise ValueError(" Elevation must be radians in range [-pi;pi]")
+    if (np.max(elevation) - np.min(elevation) >= 2 * np.pi):
         raise ValueError(" max difference in elevation must be < 2*pi")
-    if (np.any(azimuth < -np.pi) or np.any(azimuth > np.pi)):
-        # if (np.any(azimuth < -2*np.pi) or np.any(azimuth > np.pi*2)):
+    if (np.any(azimuth <= -2*np.pi) or np.any(azimuth >= 2*np.pi)):
         raise ValueError(" Azimuth must be radians in range [-2*pi;2*pi]")
     if (np.max(azimuth) - np.min(azimuth) > 2 * np.pi):
-        raise ValueError(" max difference in azimuth must be < 2*pi")
+        raise ValueError(" max difference in azimuth must be <= 2*pi")
     x, y, z = spherical_to_cartesian(elevation, azimuth, radius=1)
     unscaled_lv = np.zeros((viewing_directions.shape[0],
                             viewing_directions.shape[1],