diff --git a/pom.xml b/pom.xml
index e5c3a9a5..ff5a2b36 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 
 	<groupId>es.ubu.lsi</groupId>
 	<artifactId>ubumonitor</artifactId>
-	<version>2.10.5</version>
+	<version>2.10.6</version>
 
 
 
diff --git a/src/main/java/es/ubu/lsi/ubumonitor/AppInfo.java b/src/main/java/es/ubu/lsi/ubumonitor/AppInfo.java
index b29cba3f..9b263ea9 100644
--- a/src/main/java/es/ubu/lsi/ubumonitor/AppInfo.java
+++ b/src/main/java/es/ubu/lsi/ubumonitor/AppInfo.java
@@ -10,7 +10,7 @@
 public class AppInfo {
 
 
-	public static final String VERSION = "2.10.5";
+	public static final String VERSION = "2.10.6";
 	
 	public static final String APPLICATION_VERSION = "v" + VERSION;
 	
diff --git a/src/main/java/es/ubu/lsi/ubumonitor/clustering/chart/Scatter2DChart.java b/src/main/java/es/ubu/lsi/ubumonitor/clustering/chart/Scatter2DChart.java
index e1b30fa7..2f654212 100644
--- a/src/main/java/es/ubu/lsi/ubumonitor/clustering/chart/Scatter2DChart.java
+++ b/src/main/java/es/ubu/lsi/ubumonitor/clustering/chart/Scatter2DChart.java
@@ -62,53 +62,58 @@ public Scatter2DChart(PartitionalClusteringController clusteringController) {
 	 */
 	@Override
 	public void updateChart(List<ClusterWrapper> clusters) {
-		connector.setClusters(clusters);
-		LOGGER.debug("Clusters: {}", clusters);
-		points = AlgorithmExecuter.clustersTo(2, clusters);
-
-		Map<ClusterWrapper, Color> colors = UtilMethods.getRandomColors(clusters);
-
-		JSObject root = new JSObject();
-		JSArray datasets = new JSArray();
-		JSObject centers = new JSObject();
-		centers.putWithQuote("label", I18n.get("clustering.centroids"));
-		centers.putWithQuote("backgroundColor", "black");
-		JSArray centersData = new JSArray();
-
-		int total = clusters.stream().mapToInt(ClusterWrapper::size).sum();
-
-		for (int i = 0; i < points.size(); i++) {
-			JSObject group = new JSObject();
-			group.putWithQuote("label", getLegend(clusters.get(i), total));
-			group.put("backgroundColor", UtilMethods.colorToRGB(colors.get(clusters.get(i))));
-			JSArray data = new JSArray();
-			for (Map.Entry<UserData, double[]> userEntry : points.get(i).entrySet()) {
-				UserData user = userEntry.getKey();
-				JSObject coord = new JSObject();
-				double[] point = userEntry.getValue();
-				coord.put("x", point[0]);
-				coord.put("y", point.length == 2 ? point[1] : 0.0);
-
-				if (user == null) {
-					coord.putWithQuote("user", I18n.get("clustering.centroid"));
-					centersData.add(coord);
-				} else {
-					coord.putWithQuote("user", user.getEnrolledUser().getFullName());
-					data.add(coord);
+		try { // FIX #137 catch exception generating an empty dataset
+			connector.setClusters(clusters);
+			LOGGER.debug("Clusters: {}", clusters);
+			points = AlgorithmExecuter.clustersTo(2, clusters);
+
+			Map<ClusterWrapper, Color> colors = UtilMethods.getRandomColors(clusters);
+
+			JSObject root = new JSObject();
+			JSArray datasets = new JSArray();
+			JSObject centers = new JSObject();
+			centers.putWithQuote("label", I18n.get("clustering.centroids"));
+			centers.putWithQuote("backgroundColor", "black");
+			JSArray centersData = new JSArray();
+
+			int total = clusters.stream().mapToInt(ClusterWrapper::size).sum();
+
+			for (int i = 0; i < points.size(); i++) {
+				JSObject group = new JSObject();
+				group.putWithQuote("label", getLegend(clusters.get(i), total));
+				group.put("backgroundColor", UtilMethods.colorToRGB(colors.get(clusters.get(i))));
+				JSArray data = new JSArray();
+				for (Map.Entry<UserData, double[]> userEntry : points.get(i).entrySet()) {
+					UserData user = userEntry.getKey();
+					JSObject coord = new JSObject();
+					double[] point = userEntry.getValue();
+					coord.put("x", point[0]);
+					coord.put("y", point.length == 2 ? point[1] : 0.0);
+
+					if (user == null) {
+						coord.putWithQuote("user", I18n.get("clustering.centroid"));
+						centersData.add(coord);
+					} else {
+						coord.putWithQuote("user", user.getEnrolledUser().getFullName());
+						data.add(coord);
+					}
 				}
+				group.put("data", data);
+				datasets.add(group);
 			}
-			group.put("data", data);
-			datasets.add(group);
-		}
 
-		if (!centersData.isEmpty()) {
-			centers.put("data", centersData);
-			datasets.add(centers);
-		}
-		root.put("datasets", datasets);
-		LOGGER.debug("2D series: {}", root);
+			if (!centersData.isEmpty()) {
+				centers.put("data", centersData);
+				datasets.add(centers);
+			}
+			root.put("datasets", datasets);
+			LOGGER.debug("2D series: {}", root);
 
-		getWebEngine().executeScript("updateChart(" + root + ")");
+			getWebEngine().executeScript("updateChart(" + root + ")");
+		} catch (Exception e) {
+			LOGGER.error("Error updating chart", e);
+			getWebEngine().executeScript("updateChart({\"datasets\":[]})");
+		}
 	}
 
 	/**
diff --git a/src/main/java/es/ubu/lsi/ubumonitor/clustering/chart/Scatter3DChart.java b/src/main/java/es/ubu/lsi/ubumonitor/clustering/chart/Scatter3DChart.java
index 8d74e095..082a46b2 100644
--- a/src/main/java/es/ubu/lsi/ubumonitor/clustering/chart/Scatter3DChart.java
+++ b/src/main/java/es/ubu/lsi/ubumonitor/clustering/chart/Scatter3DChart.java
@@ -41,29 +41,34 @@ public Scatter3DChart(PartitionalClusteringController controller) {
 	 */
 	@Override
 	public void updateChart(List<ClusterWrapper> clusters) {
-		points = AlgorithmExecuter.clustersTo(3, clusters);
+		try { // FIX #137 catch exception generating an empty dataset
+			points = AlgorithmExecuter.clustersTo(3, clusters);
 
-		JSArray series = new JSArray();
-		int total = clusters.stream().mapToInt(ClusterWrapper::size).sum();
-		for (int i = 0; i < clusters.size(); i++) {
-			ClusterWrapper cluster = clusters.get(i);
-			JSObject serie = new JSObject();
-			serie.putWithQuote("name", getLegend(cluster, total));
-			JSArray data = new JSArray();
-			for (Entry<UserData, double[]> entry : points.get(i).entrySet()) {
-				double[] value = entry.getValue();
-				JSArray point = new JSArray();
-				point.add(value[0]);
-				point.add(value.length > 1 ? value[1] : 0.0);
-				point.add(value.length > 2 ? value[2] : 0.0);
-				data.add(point);
+			JSArray series = new JSArray();
+			int total = clusters.stream().mapToInt(ClusterWrapper::size).sum();
+			for (int i = 0; i < clusters.size(); i++) {
+				ClusterWrapper cluster = clusters.get(i);
+				JSObject serie = new JSObject();
+				serie.putWithQuote("name", getLegend(cluster, total));
+				JSArray data = new JSArray();
+				for (Entry<UserData, double[]> entry : points.get(i).entrySet()) {
+					double[] value = entry.getValue();
+					JSArray point = new JSArray();
+					point.add(value[0]);
+					point.add(value.length > 1 ? value[1] : 0.0);
+					point.add(value.length > 2 ? value[2] : 0.0);
+					data.add(point);
+				}
+				serie.put("data", data);
+				series.add(serie);
 			}
-			serie.put("data", data);
-			series.add(serie);
-		}
 
-		LOGGER.debug("3D series: {}", series);
-		getWebEngine().executeScript("updateChart(" + series + ")");
+			LOGGER.debug("3D series: {}", series);
+			getWebEngine().executeScript("updateChart(" + series + ")");
+		} catch (Exception e) {
+			LOGGER.error("Error updating chart 3D", e);
+			getWebEngine().executeScript("updateChart()");
+		}
 	}
 
 	/**
diff --git a/src/main/java/es/ubu/lsi/ubumonitor/clustering/controller/AlgorithmExecuter.java b/src/main/java/es/ubu/lsi/ubumonitor/clustering/controller/AlgorithmExecuter.java
index 66ad9dcc..abb71b3a 100644
--- a/src/main/java/es/ubu/lsi/ubumonitor/clustering/controller/AlgorithmExecuter.java
+++ b/src/main/java/es/ubu/lsi/ubumonitor/clustering/controller/AlgorithmExecuter.java
@@ -193,7 +193,7 @@ public static List<Map<UserData, double[]>> clustersTo(int dim, List<ClusterWrap
 		List<Map<UserData, double[]>> points = new ArrayList<>();			
 		// PCA with T-SNE 	
 		PrincipalComponentAnalysis pca = new PrincipalComponentAnalysis();		
-		if (matrix[0].length > dim) {
+		if (matrix[0].length >= dim) { // FIX #137 changed > to >=
 			matrix = pca.pca(matrix, dim);
 		}
 
diff --git a/src/main/java/es/ubu/lsi/ubumonitor/util/UtilMethods.java b/src/main/java/es/ubu/lsi/ubumonitor/util/UtilMethods.java
index 0fe4fc7b..15e6f3f5 100644
--- a/src/main/java/es/ubu/lsi/ubumonitor/util/UtilMethods.java
+++ b/src/main/java/es/ubu/lsi/ubumonitor/util/UtilMethods.java
@@ -154,8 +154,8 @@ public static <T> String joinWithQuotes(List<T> list) {
 	 * @param stringToRemove need to remove reserved character
 	 * @return without reserved character
 	 */
-	public static String removeReservedChar(String stringToRemove) {
-		String newString = stringToRemove.replaceAll(":|\\\\|/|\\?|\\*|\\|", "");
+	public static String removeReservedChar(String stringToRemove) {		
+		String newString = stringToRemove.replaceAll("\"|\\||<|>|:|\\\\|/|\\?|\\*|\\|", ""); // FIX #139 added more dangerous characters 
 		return newString.trim();
 		
 	}
diff --git a/src/test/java/es/ubu/lsi/ubumonitor/UnitTest.java b/src/test/java/es/ubu/lsi/ubumonitor/UnitTest.java
index 974b7f09..ac8a133e 100644
--- a/src/test/java/es/ubu/lsi/ubumonitor/UnitTest.java
+++ b/src/test/java/es/ubu/lsi/ubumonitor/UnitTest.java
@@ -57,6 +57,9 @@ public void removeBackSlashTest() {
 		fillMap(map, "Inglés EPS VENA-curso 2019:20", "Inglés EPS VENA-curso 201920");
 		fillMap(map, "Inglés EPS\\ VENA-curso 2019:20", "Inglés EPS VENA-curso 201920");
 		fillMap(map, "Inglés EPS ?VENA-curso 2019:20", "Inglés EPS VENA-curso 201920");
+		fillMap(map, "Inglés EPS \"VENA-curso 2019:20\"", "Inglés EPS VENA-curso 201920");
+		fillMap(map, "Inglés EPS <VENA-curso 2019:20>", "Inglés EPS VENA-curso 201920");
+		fillMap(map, "Inglés EPS |VENA-curso 2019:20|", "Inglés EPS VENA-curso 201920");
 		for (Map.Entry<String, String> entry : map.entrySet()) {
 			assertEquals(entry.getValue(), entry.getKey());
 		}