diff --git a/src/main/java/org/gcube/portlets/user/td/columnwidget/client/ChangeColumnTypePanel.java b/src/main/java/org/gcube/portlets/user/td/columnwidget/client/ChangeColumnTypePanel.java
index 4d03d44..79a0c52 100644
--- a/src/main/java/org/gcube/portlets/user/td/columnwidget/client/ChangeColumnTypePanel.java
+++ b/src/main/java/org/gcube/portlets/user/td/columnwidget/client/ChangeColumnTypePanel.java
@@ -846,14 +846,18 @@ public class ChangeColumnTypePanel extends FramedPanel implements
 	}
 
 	protected void updateAttributeType(ColumnDataType type) {
-		ArrayList<ValueDataFormat> valueDataFormats = valueDataFormatMap
-				.get(type);
-		comboValueDataFormat.clear();
-		comboValueDataFormat.reset();
-		comboValueDataFormat.getStore().clear();
-		comboValueDataFormat.getStore().addAll(valueDataFormats);
-		comboValueDataFormat.redraw();
-
+		if (type.compareTo(ColumnDataType.Text) == 0) {
+			comboValueDataFormatLabel.setVisible(false);
+		} else {
+			comboValueDataFormatLabel.setVisible(true);
+			ArrayList<ValueDataFormat> valueDataFormats = valueDataFormatMap
+					.get(type);
+			comboValueDataFormat.clear();
+			comboValueDataFormat.reset();
+			comboValueDataFormat.getStore().clear();
+			comboValueDataFormat.getStore().addAll(valueDataFormats);
+			comboValueDataFormat.redraw();
+		}
 	}
 
 	protected void updateLocaleType(LocaleTypeElement type) {
@@ -861,6 +865,7 @@ public class ChangeColumnTypePanel extends FramedPanel implements
 	}
 
 	protected void updatePeriodType(PeriodDataType periodDataType) {
+	
 		ArrayList<ValueDataFormat> valueDataFormats = periodDataType
 				.getTimeDataFormats();
 		comboValueDataFormat.clear();
@@ -1191,7 +1196,8 @@ public class ChangeColumnTypePanel extends FramedPanel implements
 							ValueDataFormat valueDataFormat = comboValueDataFormat
 									.getCurrentValue();
 							if (valueDataFormat != null) {
-								changeColumnTypeSession.setValueDataFormat(valueDataFormat);
+								changeColumnTypeSession
+										.setValueDataFormat(valueDataFormat);
 								callChangeColumnType();
 							} else {
 								UtilsGXT3.alert("Attention",
@@ -1221,7 +1227,8 @@ public class ChangeColumnTypePanel extends FramedPanel implements
 							ValueDataFormat valueDataFormat = comboValueDataFormat
 									.getCurrentValue();
 							if (valueDataFormat != null) {
-								changeColumnTypeSession.setValueDataFormat(valueDataFormat);
+								changeColumnTypeSession
+										.setValueDataFormat(valueDataFormat);
 								callChangeColumnType();
 							} else {
 								UtilsGXT3.alert("Attention",