Defing PipelineStepObject and PipelineStepMethod to assess time execution. Removing exception managment to let the user catch them into the script.

1 files changed, 14 insertions, 3 deletions

diff --git a/docs/user_guide/gaze_analysis_pipeline/configuration_and_execution.md b/docs/user_guide/gaze_analysis_pipeline/configuration_and_execution.md
index 0edbef3..c53cfda 100644
--- a/docs/user_guide/gaze_analysis_pipeline/configuration_and_execution.md
+++ b/docs/user_guide/gaze_analysis_pipeline/configuration_and_execution.md
@@ -94,14 +94,25 @@ In the example file, the choosen analysis algorithms are the [Basic](../../argaz
 
 ## Pipeline execution
 
-Timestamped gaze positions have to be passed one by one to [ArFrame.look](../../argaze.md/#argaze.ArFeatures.ArFrame.look) method to execute the whole instantiated pipeline.
+Timestamped gaze positions have to be passed one by one to [ArFrame.look](../../argaze.md/#argaze.ArFeatures.ArFrame.look) method to execute the whole instantiated pipeline. 
+
+!!! warning "Mandatory"
+
+	[ArFrame.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 ArFrame at a timestamped gaze position
-    ar_frame.look(timestamp, gaze_position)
+    try:
+
+    	# Look ArFrame at a timestamped gaze position
+    	ar_frame.look(timestamp, gaze_position)
+
+    # Do something with pipeline exception
+    except Exception as e:
+        
+        ...
 ```
 !!! note ""