diff --git a/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/WrappedSyntaxView.java b/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/WrappedSyntaxView.java
index 5f2f83337..b08b0caf7 100644
--- a/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/WrappedSyntaxView.java
+++ b/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/WrappedSyntaxView.java
@@ -1351,6 +1351,11 @@ System.err.println(">>> >>> calculated number of lines for this view (line " + l
 
 							// Start at alloc.x since this chunk starts
 							// at the beginning of a physical line.
+							if (tlist == null) {
+								p0 = (p == p0) ? p1 : p;
+								alloc.y += alloc.height;
+								continue;
+							}
 							int n = tlist.getListOffset(textArea,
 										WrappedSyntaxView.this,
 										alloc.x, x);
diff --git a/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/parser/TaskTagParser.java b/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/parser/TaskTagParser.java
index 126193e82..7366c1d63 100644
--- a/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/parser/TaskTagParser.java
+++ b/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/parser/TaskTagParser.java
@@ -18,6 +18,7 @@ import com.fr.design.gui.syntax.ui.rsyntaxtextarea.ErrorStrip;
 import com.fr.design.gui.syntax.ui.rsyntaxtextarea.RSyntaxDocument;
 import com.fr.design.gui.syntax.ui.rsyntaxtextarea.SyntaxConstants;
 import com.fr.design.gui.syntax.ui.rsyntaxtextarea.Token;
+import com.fr.stable.StringUtils;
 
 
 /**
@@ -60,6 +61,7 @@ public class TaskTagParser extends AbstractParser {
 	}
 
 
+	@SuppressWarnings("squid:S2259")
 	public ParseResult parse(RSyntaxDocument doc, String style) {
 
 		Element root = doc.getDefaultRootElement();
@@ -101,6 +103,9 @@ public class TaskTagParser extends AbstractParser {
 			}
 
 			if (start>-1) {
+				if (StringUtils.isEmpty(text)) {
+					continue;
+				}
 				text = text.substring(start);
 				// TODO: Strip off end of MLC's if they're there.
 				int len = text.length();
diff --git a/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/LineNumberList.java b/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/LineNumberList.java
index b6cf8edd5..3fd4c7504 100644
--- a/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/LineNumberList.java
+++ b/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/LineNumberList.java
@@ -2,7 +2,7 @@
  * 02/11/2009
  *
  * LineNumberList.java - Renders line numbers in an RTextScrollPane.
- * 
+ *
  * This library is distributed under a modified BSD license.  See the included
  * RSyntaxTextArea.License.txt file for details.
  */
@@ -349,6 +349,10 @@ public class LineNumberList extends AbstractGutterComponent
 				int width = metrics.stringWidth(number);
 				g.drawString(number, rhs-width,y);
 				y += cellHeight;
+				if (fm == null) {
+					line++;
+					continue;
+				}
 				Fold fold = fm.getFoldForLine(line-1);
 				// Skip to next line to paint, taking extra care for lines with
 				// block ends and begins together, e.g. "} else {"
@@ -371,6 +375,10 @@ public class LineNumberList extends AbstractGutterComponent
 				String number = Integer.toString(line + getLineNumberingStartIndex() - 1);
 				g.drawString(number, RHS_BORDER_WIDTH, y);
 				y += cellHeight;
+				if (fm == null) {
+					line++;
+					continue;
+				}
 				Fold fold = fm.getFoldForLine(line-1);
 				// Skip to next line to paint, taking extra care for lines with
 				// block ends and begins together, e.g. "} else {"
diff --git a/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/RTextArea.java b/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/RTextArea.java
index 9ea11b64d..d2e3284d7 100644
--- a/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/RTextArea.java
+++ b/designer-base/src/main/java/com/fr/design/gui/syntax/ui/rtextarea/RTextArea.java
@@ -635,6 +635,9 @@ public class RTextArea extends RTextAreaBase implements Printable {
 			parent = parent.getParent();
 		}
 		KeyStroke backspace = KeyStroke.getKeyStroke("BACK_SPACE");
+		if (inputMap == null) {
+			return;
+		}
 		inputMap.put(backspace, DefaultEditorKit.deletePrevCharAction);
 	}