diff --git a/FDTD/processcurrent.cpp b/FDTD/processcurrent.cpp
index 28e2622..3ed12b1 100644
--- a/FDTD/processcurrent.cpp
+++ b/FDTD/processcurrent.cpp
@@ -15,6 +15,7 @@
 *	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include "tools/global.h"
 #include "processcurrent.h"
 #include <iomanip>
 
@@ -28,8 +29,19 @@ ProcessCurrent::~ProcessCurrent()
 
 void ProcessCurrent::DefineStartStopCoord(double* dstart, double* dstop)
 {
-	if (Op->SnapToMesh(dstart,start,true,m_start_inside)==false) cerr << "ProcessCurrent::DefineStartStopCoord: Warning: Snapped line outside field domain!!" << endl;
-	if (Op->SnapToMesh(dstop,stop,true,m_stop_inside)==false) cerr << "ProcessCurrent::DefineStartStopCoord: Warning: Snapped line outside field domain!!" << endl;
+	if (Op->SnapToMesh(dstart,start)==false)
+		cerr << "ProcessCurrent::DefineStartStopCoord: Warning: Snapped line outside field domain!!" << endl;
+	if (Op->SnapToMesh(dstop,stop)==false)
+		cerr << "ProcessCurrent::DefineStartStopCoord: Warning: Snapped line outside field domain!!" << endl;
+
+	if (g_settings.showProbeDiscretization()) {
+		cerr << m_filename << ": snapped coords: (" << Op->GetDiscLine( 0, start[0], true ) << ","
+				<< Op->GetDiscLine( 1, start[1], true ) << "," << Op->GetDiscLine( 2, start[2], true ) << ") -> ("
+				<< Op->GetDiscLine( 0, stop[0], true ) << ","<< Op->GetDiscLine( 1, stop[1], true ) << ","
+				<< Op->GetDiscLine( 2, stop[2], true ) << ")";
+		cerr << "   [" << start[0] << "," << start[1] << "," << start[2] << "] -> ["
+				<< stop[0] << "," << stop[1] << "," << stop[2] << "]" << endl;
+	}
 }
 
 int ProcessCurrent::Process()
diff --git a/FDTD/processing.cpp b/FDTD/processing.cpp
index d557fd6..5b1835f 100644
--- a/FDTD/processing.cpp
+++ b/FDTD/processing.cpp
@@ -15,6 +15,7 @@
 *	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include "tools/global.h"
 #include "processing.h"
 
 Processing::Processing(Operator* op, Engine* eng)
@@ -87,8 +88,19 @@ void Processing::AddSteps(vector<unsigned int> steps)
 
 void Processing::DefineStartStopCoord(double* dstart, double* dstop)
 {
-	if (Op->SnapToMesh(dstart,start)==false) cerr << "Processing::DefineStartStopCoord: Warning: Snapped line outside field domain!!" << endl;
-	if (Op->SnapToMesh(dstop,stop)==false) cerr << "Processing::DefineStartStopCoord: Warning: Snapped line outside field domain!!" << endl;
+	if (Op->SnapToMesh(dstart,start)==false)
+		cerr << "Processing::DefineStartStopCoord: Warning: Snapped line outside field domain!!" << endl;
+	if (Op->SnapToMesh(dstop,stop)==false)
+		cerr << "Processing::DefineStartStopCoord: Warning: Snapped line outside field domain!!" << endl;
+
+	if (g_settings.showProbeDiscretization()) {
+		cerr << m_filename << ": snapped coords: (" << Op->GetDiscLine( 0, start[0], false ) << ","
+				<< Op->GetDiscLine( 1, start[1], false ) << "," << Op->GetDiscLine( 2, start[2], false ) << ") -> ("
+				<< Op->GetDiscLine( 0, stop[0], false ) << ","<< Op->GetDiscLine( 1, stop[1], false ) << ","
+				<< Op->GetDiscLine( 2, stop[2], false ) << ")";
+		cerr << "   [" << start[0] << "," << start[1] << "," << start[2] << "] -> ["
+				<< stop[0] << "," << stop[1] << "," << stop[2] << "]" << endl;
+	}
 }
 
 double Processing::CalcLineIntegral(unsigned int* start, unsigned int* stop, int field) const
diff --git a/main.cpp b/main.cpp
index 20703c7..7514a28 100644
--- a/main.cpp
+++ b/main.cpp
@@ -22,6 +22,7 @@
 #include <sstream>
 
 #include "openems.h"
+#include "tools/global.h"
 
 #ifndef GIT_VERSION
 #define GIT_VERSION "unknown:compiled@" __DATE__
@@ -60,6 +61,9 @@ int main(int argc, char *argv[])
 	{
 		for (int n=2;n<argc;++n)
 		{
+			if (g_settings.parseCommandLineArgument(argv[n]))
+				continue;
+
 			if (!FDTD.parseCommandLineArgument(argv[n]))
 				cout << "openEMS - unknown argument: " << argv[n] << endl;
 		}
diff --git a/openEMS.pro b/openEMS.pro
index 48a5344..933c5ea 100644
--- a/openEMS.pro
+++ b/openEMS.pro
@@ -55,7 +55,8 @@ SOURCES += main.cpp \
     FDTD/engine_ext_cylinder.cpp \
     FDTD/operator_sse_compressed.cpp \
     FDTD/engine_sse_compressed.cpp \
-    FDTD/operator_multithread.cpp
+    FDTD/operator_multithread.cpp \
+    tools/global.cpp
 HEADERS += tools/ErrorMsg.h \
     tools/AdrOp.h \
     tools/constants.h \
@@ -81,7 +82,8 @@ HEADERS += tools/ErrorMsg.h \
     FDTD/engine_ext_cylinder.h \
     FDTD/operator_sse_compressed.h \
     FDTD/engine_sse_compressed.h \
-    FDTD/operator_multithread.h
+    FDTD/operator_multithread.h \
+    tools/global.h
 QMAKE_CXXFLAGS_RELEASE = -O3 \
     -g \
 	-march=native
diff --git a/tools/global.cpp b/tools/global.cpp
new file mode 100644
index 0000000..bdbea54
--- /dev/null
+++ b/tools/global.cpp
@@ -0,0 +1,46 @@
+/*
+*	Copyright (C) 2010 Sebastian Held <sebastian.held@gmx.de>
+*
+*	This program is free software: you can redistribute it and/or modify
+*	it under the terms of the GNU General Public License as published by
+*	the Free Software Foundation, either version 3 of the License, or
+*	(at your option) any later version.
+*
+*	This program is distributed in the hope that it will be useful,
+*	but WITHOUT ANY WARRANTY; without even the implied warranty of
+*	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*	GNU General Public License for more details.
+*
+*	You should have received a copy of the GNU General Public License
+*	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <cstring>
+#include <iostream>
+#include "global.h"
+
+using namespace std;
+
+// create global object
+Global g_settings;
+
+Global::Global()
+{
+	m_showProbeDiscretization = false;
+}
+
+//! \brief This function initializes the object
+bool Global::parseCommandLineArgument( const char *argv )
+{
+	if (!argv)
+		return false;
+
+	if (strcmp(argv,"--showProbeDiscretization")==0)
+	{
+		cout << "openEMS - showing probe discretization information" << endl;
+		m_showProbeDiscretization = true;
+		return true;
+	}
+
+	return false;
+}
diff --git a/tools/global.h b/tools/global.h
new file mode 100644
index 0000000..10e5e34
--- /dev/null
+++ b/tools/global.h
@@ -0,0 +1,35 @@
+/*
+*	Copyright (C) 2010 Sebastian Held <sebastian.held@gmx.de>
+*
+*	This program is free software: you can redistribute it and/or modify
+*	it under the terms of the GNU General Public License as published by
+*	the Free Software Foundation, either version 3 of the License, or
+*	(at your option) any later version.
+*
+*	This program is distributed in the hope that it will be useful,
+*	but WITHOUT ANY WARRANTY; without even the implied warranty of
+*	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*	GNU General Public License for more details.
+*
+*	You should have received a copy of the GNU General Public License
+*	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef GLOBAL_H
+#define GLOBAL_H
+
+class Global
+{
+public:
+    Global();
+	bool parseCommandLineArgument( const char *argv );
+
+	bool showProbeDiscretization() const {return m_showProbeDiscretization;}
+
+protected:
+	bool m_showProbeDiscretization;
+};
+
+extern Global g_settings;
+
+#endif // GLOBAL_H