diff --git a/FDTD/cartoperator.cpp b/FDTD/cartoperator.cpp
index e361323..3cde987 100644
--- a/FDTD/cartoperator.cpp
+++ b/FDTD/cartoperator.cpp
@@ -431,7 +431,7 @@ unsigned int CartOperator::GetVoltageExcitation(unsigned int* &index, FDTD_FLOAT
 				if (prop)
 				{
 					CSPropElectrode* elec = prop->ToElectrode();
-					if (elec->GetType()==0)
+					if (elec->GetExcitType()==0)
 					{
 						vIndex.push_back(ipos);
 						for (int n=0;n<3;++n)
@@ -444,5 +444,5 @@ unsigned int CartOperator::GetVoltageExcitation(unsigned int* &index, FDTD_FLOAT
 			}
 		}
 	}
-	cerr << "size:" << vIndex.size() << endl;
+	cerr << "size: " << vIndex.size() << endl;
 }
diff --git a/main.cpp b/main.cpp
index 63bdfd7..6d4e2ea 100644
--- a/main.cpp
+++ b/main.cpp
@@ -5,15 +5,16 @@
 
 using namespace std;
 
+void BuildMSL(ContinuousStructure &CSX);
+
 int main(int argc, char *argv[])
 {
-    cout << "Hello World" << endl;
-	fprintf(stderr,"%e\n",1.4456);
+	ContinuousStructure CSX;
 
 	time_t startTime=time(NULL);
 
-    ContinuousStructure CSX;
-	CSX.ReadFromXML("csx-files/1Mill.xml");
+//	CSX.ReadFromXML("csx-files/MSL.xml");
+	BuildMSL(CSX);
 
 	CartOperator cop;
 	cop.SetGeometryCSX(&CSX);
@@ -32,3 +33,48 @@ int main(int argc, char *argv[])
 
     return 0;
 }
+
+void BuildMSL(ContinuousStructure &CSX)
+{
+	CSPropMaterial* mat = new CSPropMaterial(CSX.GetParameterSet());
+	mat->SetEpsilon(3.6);
+	CSX.AddProperty(mat);
+
+	CSPrimBox* box = new CSPrimBox(CSX.GetParameterSet(),mat);
+	box->SetCoord(0,-200.0);box->SetCoord(1,200.0);
+	box->SetCoord(2,0.0);box->SetCoord(3,50.0);
+	box->SetCoord(4,-1000.0);box->SetCoord(5,1000.0);
+	CSX.AddPrimitive(box);
+
+	CSPropMaterial* MSL = new CSPropMaterial(CSX.GetParameterSet());
+	MSL->SetKappa(56e6);
+	CSX.AddProperty(MSL);
+
+	box = new CSPrimBox(CSX.GetParameterSet(),MSL);
+	box->SetCoord(0,-20.0);box->SetCoord(1,20.0);
+	box->SetCoord(2,0.0);box->SetCoord(3,50.0);
+	box->SetCoord(4,-1000.0);box->SetCoord(5,1000.0);
+	CSX.AddPrimitive(box);
+
+	CSPropElectrode* elec = new CSPropElectrode(CSX.GetParameterSet());
+	elec->SetExcitation(1,1);
+	elec->SetExcitType(0);
+	CSX.AddProperty(elec);
+
+	box = new CSPrimBox(CSX.GetParameterSet(),elec);
+	box->SetCoord(0,-20.0);box->SetCoord(1,20.0);
+	box->SetCoord(2,0.0);box->SetCoord(3,50.0);
+	box->SetCoord(4,0.0);box->SetCoord(5,0.0);
+	CSX.AddPrimitive(box);
+
+	CSRectGrid* grid = CSX.GetGrid();
+
+	for (int n=-1000;n<=1000;n+=20)
+		grid->AddDiscLine(2,(double)n);
+	for (int n=-200;n<=200;n+=10)
+		grid->AddDiscLine(0,(double)n);
+	for (int n=0;n<=300;n+=10)
+		grid->AddDiscLine(1,(double)n);
+
+	CSX.Write2XML("csx-files/MSL.xml");
+}