diff --git a/FDTD/excitation.cpp b/FDTD/excitation.cpp
index 4e1ba85..b750c91 100644
--- a/FDTD/excitation.cpp
+++ b/FDTD/excitation.cpp
@@ -53,7 +53,7 @@ void Excitation::Reset( double timestep )
 	m_foi = 0;
 }
 
-bool Excitation::SetupGaussianPulse(double f0, double fc)
+void Excitation::SetupGaussianPulse(double f0, double fc)
 {
 	m_Excit_Type = Excitation::GaissianPulse;
 	m_f0 = f0;
@@ -62,7 +62,7 @@ bool Excitation::SetupGaussianPulse(double f0, double fc)
 	m_SignalPeriod = 0;
 }
 
-bool Excitation::SetupSinusoidal(double f0)
+void Excitation::SetupSinusoidal(double f0)
 {
 	m_Excit_Type = Excitation::Sinusoidal;
 	m_f0 = f0;
@@ -70,21 +70,21 @@ bool Excitation::SetupSinusoidal(double f0)
 	m_SignalPeriod = 1/f0;
 }
 
-bool Excitation::SetupDiracPulse(double fmax)
+void Excitation::SetupDiracPulse(double fmax)
 {
 	m_Excit_Type = Excitation::DiracPulse;
 	m_SignalPeriod = 0;
 	m_f_max = fmax;
 }
 
-bool Excitation::SetupStepExcite(double fmax)
+void Excitation::SetupStepExcite(double fmax)
 {
 	m_Excit_Type = Excitation::Step;
 	m_SignalPeriod = 0;
 	m_f_max = fmax;
 }
 
-bool Excitation::SetupCustomExcite(string str, double f0, double fmax)
+void Excitation::SetupCustomExcite(string str, double f0, double fmax)
 {
 	m_Excit_Type = Excitation::CustomExcite;
 	m_CustomExc_Str = str;
diff --git a/FDTD/excitation.h b/FDTD/excitation.h
index 8ae3a5b..b43ad28 100644
--- a/FDTD/excitation.h
+++ b/FDTD/excitation.h
@@ -31,11 +31,11 @@ public:
 
 	virtual void Reset( double timestep );
 
-	bool SetupGaussianPulse(double f0, double fc);
-	bool SetupSinusoidal(double f0);
-	bool SetupDiracPulse(double fmax);
-	bool SetupStepExcite(double fmax);
-	bool SetupCustomExcite(std::string str, double f0, double fmax);
+	void SetupGaussianPulse(double f0, double fc);
+	void SetupSinusoidal(double f0);
+	void SetupDiracPulse(double fmax);
+	void SetupStepExcite(double fmax);
+	void SetupCustomExcite(std::string str, double f0, double fmax);
 
 	double GetCenterFreq() {return m_f0;}
 	double GetCutOffFreq() {return m_fc;}