diff --git a/examples/python3/tutorial/formation/chiba/Actuator.py b/examples/python3/tutorial/formation/chiba/Actuator.py
index 31889447..b1a52af5 100644
--- a/examples/python3/tutorial/formation/chiba/Actuator.py
+++ b/examples/python3/tutorial/formation/chiba/Actuator.py
@@ -2,8 +2,6 @@
 from fingerController import FingerController #for keyboard controlling
 #from timerreset import FingerController   #Uncomment to perform timed measurements(increases of 5kPa every 2 seconds)
 from loopstest_function_param3 import looptest #algorithm for generating the fiber loops
-import gmsh
-
 
 
 def createScene(rootNode):
@@ -83,7 +81,7 @@ def createScene(rootNode):
         fiber.addObject('MeshTopology', name='lines', lines=[[i, i + 1] for i in range(loopnum)])
         
         #fiber.addObject("FixedConstraint", name="FixedConstragetLinkPathint", indices=[0])
-        fiber.addObject("StiffSpringForceField", template="Vec3d", name="springs", showArrowSize=0.5, drawMode=1,
+        fiber.addObject("SpringForceField", template="Vec3d", name="springs", showArrowSize=0.5, drawMode=1,
                         stiffness=Ks, damping=Kd, indices1=indices1, indices2=indices2, lengths=lengths)
 
         # Mapping 
diff --git a/examples/python3/tutorial/formation/chiba/actuator_v1.py b/examples/python3/tutorial/formation/chiba/actuator_v1.py
index 981c0ee2..22ddca89 100644
--- a/examples/python3/tutorial/formation/chiba/actuator_v1.py
+++ b/examples/python3/tutorial/formation/chiba/actuator_v1.py
@@ -1,7 +1,6 @@
 import Sofa
 from fingerController import FingerController  # for keyboard controlling
 from loopstest_function_param3 import looptest  # algorithm for generating the fiber loops
-import gmsh
 
 from useful.header import addHeader, addSolverNode
 
@@ -73,7 +72,7 @@ def createScene(root_node):
                        showObject=True, showObjectScale=1)
     hitching.addObject('MeshTopology', name='lines',
                        lines=[[i, i + 1] for i in range(num_loops - 1)])
-    hitching.addObject("StiffSpringForceField", template="Vec3d", name="springs", showArrowSize=0.5, drawMode=1,
+    hitching.addObject("SpringForceField", template="Vec3d", name="springs", showArrowSize=0.5, drawMode=1,
                        stiffness=Ks, damping=Kd, indices1=[0, 1, 2, 3, 4, 5, 6], indices2=[1, 2, 3, 4, 5, 6, 7],
                        lengths=loop_distance)
     hitching.addObject('BarycentricMapping', name='mapping')