fixed previous error related to getting initial values. New error emerged, as there is no object or function called calculated_current() in model - no idea how code was able to function previously

fitter.py

@@ -23,10 +23,12 @@ class Fitter:
         self.fit_results = {}
 
         self.tspan = [0, 1000]
-        self.initial_values = model.get_initial_values(self)
         self.dt = 1  # 1.0
         self.time_points = np.arange(*self.tspan, self.dt)
         
+        model=Model()
+        self.initial_values = model.get_initial_values()
+
         self.iteration = 0  # least squares iteration counter
 
         t0, t1 = self.current_fit_range = current_fit_range