fitting is initialized, ftol met, issues to be resolved with current

Model.py

@@ -431,7 +431,6 @@ class Model:
         ax4.set_xlabel("time [ms]")
         ax4.set_ylabel(r"$\mu mol/3l$")
 
-        plt.show()
         return states, V
 
 
@@ -466,3 +465,4 @@ if __name__ == "__main__":
         FCa_0,  # FCa
     ]
     model.solve(initial_values=initial_values, tspan=[0, 1000], dt=1.0, times=None)
+    plt.show()

fitter.py

@@ -22,7 +22,7 @@ class Fitter:
         self.current_fit_range = current_fit_range
         self.fit_results = {}
 
-        self.tspan = [0,1000]
+        self.tspan = [0, 1000]
         self.dt: float = 1  # 1.0
         self.time_points = np.arange(*self.tspan, self.dt)