diff --git a/openems.cpp b/openems.cpp
index 0e87553..3f18fbf 100644
--- a/openems.cpp
+++ b/openems.cpp
@@ -330,8 +330,6 @@ int openEMS::SetupFDTD(const char* file)
 
 	cout << "Read Geometry..." << endl;
 	ContinuousStructure CSX;
-	if (CylinderCoords)
-		CSX.SetCoordInputType(CYLINDRICAL); //tell CSX to use cylinder-coords
 	string EC(CSX.ReadFromXML(openEMSxml));
 	if (EC.empty()==false)
 	{
@@ -339,6 +337,13 @@ int openEMS::SetupFDTD(const char* file)
 //		return(-2);
 	}
 
+	if (CylinderCoords)
+		if (CSX.GetCoordInputType()!=CYLINDRICAL)
+		{
+		cerr << "openEMS::SetupFDTD: Warning: Coordinate system found in the CSX file is not a cylindrical. Forcing to cylindrical coordinate system!" << endl;
+			CSX.SetCoordInputType(CYLINDRICAL); //tell CSX to use cylinder-coords
+		}
+
 	if (m_debugCSX)
 		CSX.Write2XML("debugCSX.xml");