diff --git a/bv_use_cases/simplest/__init__.py b/bv_use_cases/simplest/__init__.py
index 4f57670..a113236 100644
--- a/bv_use_cases/simplest/__init__.py
+++ b/bv_use_cases/simplest/__init__.py
@@ -1,4 +1,6 @@
 import os
+import time
+
 from soma.controller import path, directory, List, field
 from capsul.api import Process
 
@@ -7,10 +9,10 @@ class ListDirectory(Process):
     Return a list containing the names of the files in the directory.
     '''
     path : directory(doc='directory to list')
-    result : field(List[path()], doc='the output', output=True)
+    result : field(type_=List[path()], doc='the output', output=True)
 
     def execute(self, context):
-        self.result = os.listdir(self.path)
+        self.result = list_directory(self.path)
 
 
 def list_directory(
@@ -19,4 +21,5 @@ def list_directory(
     '''
     Return a list containing the names of the files in the directory.
     '''
+    time.sleep(3)
     return os.listdir(path)
diff --git a/bv_use_cases/simplest/__main__.py b/bv_use_cases/simplest/__main__.py
index 641ec31..7b3d479 100644
--- a/bv_use_cases/simplest/__main__.py
+++ b/bv_use_cases/simplest/__main__.py
@@ -22,14 +22,11 @@
 # to separate this two steps; for instance if one only wants to see the engine 
 # configuration. Therefore, a "with" statement must be used to define portion
 # of code requiring a valid connection to the CapsulEngine.
-with capsul.engine() as capsul_engine:
-    # Here we are connected to the Capsul engine and can send command to it
-    execution_id = capsul_engine.start(executable)
-    capsul_engine.wait(execution_id)
-    final_status = capsul_engine.status(execution_id)
-    pprint(final_status)
-    capsul_engine.raise_for_status(final_status)
 
+capsul_engine = capsul.engine()
+with capsul_engine.connect():
+    capsul_engine.run(executable)
+    print(executable.result)
 # Here the connection to the CapsulEngine is closed. The execution_id may not be
 # valid for another connection to the same engine. This is engine implementation
 # dependent.
\ No newline at end of file