1 files changed, 26 insertions, 4 deletions
diff --git a/docs/user_guide/aruco_markers_pipeline/configuration_and_execution.md b/docs/user_guide/aruco_markers_pipeline/configuration_and_execution.md
index 43bb64e..5b740dc 100644
--- a/docs/user_guide/aruco_markers_pipeline/configuration_and_execution.md
+++ b/docs/user_guide/aruco_markers_pipeline/configuration_and_execution.md
@@ -97,12 +97,23 @@ The usual [ArFrame visualisation parameters](../gaze_analysis_pipeline/visualisa
 
 Pass each camera image to [ArUcoCamera.watch](../../argaze.md/#argaze.ArFeatures.ArCamera.watch) method to execute the whole pipeline dedicated to ArUco markers detection, scene pose estimation and 3D AOI projection.
 
+!!! warning "Mandatory"
+
+    [ArUcoCamera.watch](../../argaze.md/#argaze.ArFeatures.ArCamera.watch) method must be called from a *try* block to catch pipeline exceptions.
+
 ```python
 # Assuming that Full HD (1920x1080) timestamped images are available
 ...:
 
-    # Detect ArUco markers, estimate scene pose then, project 3D AOI into camera frame
-    aruco_camera.watch(timestamp, image)
+    try:
+
+        # Detect ArUco markers, estimate scene pose then, project 3D AOI into camera frame
+        aruco_camera.watch(timestamp, image)
+
+    # Do something with pipeline exception
+    except Exception as e:
+
+        ...
 
     # Display ArUcoCamera frame image to display detected ArUco markers, scene pose, 2D AOI projection and ArFrame visualisation.
     ... aruco_camera.image()
@@ -114,12 +125,23 @@ As mentioned above, [ArUcoCamera](../../argaze.md/#argaze.ArUcoMarkers.ArUcoCame
 
 Particularly, timestamped gaze positions can be passed one by one to [ArUcoCamera.look](../../argaze.md/#argaze.ArFeatures.ArFrame.look) method to execute the whole pipeline dedicated to gaze analysis.
 
+!!! warning "Mandatory"
+
+    [ArUcoCamera.look](../../argaze.md/#argaze.ArFeatures.ArFrame.look) method must be called from a *try* block to catch pipeline exceptions.
+
 ```python
 # Assuming that timestamped gaze positions are available
 ...
 
-    # Look ArUcoCamera frame at a timestamped gaze position
-    aruco_camera.look(timestamp, gaze_position)
+    try:
+
+        # Look ArUcoCamera frame at a timestamped gaze position
+        aruco_camera.look(timestamp, gaze_position)
+
+    # Do something with pipeline exception
+    except Exception as e:
+        
+        ...
 ```
 
 !!! note ""