diff --git a/Model.py b/Model.py
index bc774f3..7988459 100644
--- a/Model.py
+++ b/Model.py
@@ -348,8 +348,8 @@ class Model:
             FCa_0,  # FCa
         ]
 
-    def calculated_current():
-        return None
+    def calculated_current(self):
+        return 
 
     def solve(self, initial_values, tspan, dt, times):
         times = np.arange(*tspan, dt)
diff --git a/__pycache__/Model.cpython-311.pyc b/__pycache__/Model.cpython-311.pyc
index 421bef4..b9c7d0c 100644
Binary files a/__pycache__/Model.cpython-311.pyc and b/__pycache__/Model.cpython-311.pyc differ