diff --git a/debug/org.eclipse.cdt.debug.core/ChangeLog b/debug/org.eclipse.cdt.debug.core/ChangeLog
index da9105e6bec..9360bc9af2c 100644
--- a/debug/org.eclipse.cdt.debug.core/ChangeLog
+++ b/debug/org.eclipse.cdt.debug.core/ChangeLog
@@ -1,3 +1,8 @@
+2003-11-07 Mikhail Khodjaiants
+	Fix for PR 46303: Exception when selecting Debug... menu.
+	Check if the string passed to the 'getCommonSourceLocationsFromMemento' method is not empty.
+	* SourceUtils.java
+
 2003-11-05 Mikhail Khodjaiants
 	'getCDIBreakpointFile' returns wrong file for address breakpoints.
 	* CBreakpointManager.java
diff --git a/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/sourcelookup/SourceUtils.java b/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/sourcelookup/SourceUtils.java
index 3a6ead4d6a1..2906204a3ca 100644
--- a/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/sourcelookup/SourceUtils.java
+++ b/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/sourcelookup/SourceUtils.java
@@ -82,7 +82,7 @@ public class SourceUtils
 	public static ICSourceLocation[] getCommonSourceLocationsFromMemento( String memento )
 	{
 		ICSourceLocation[] result = new ICSourceLocation[0];
-		if ( memento != null )
+		if ( !isEmpty( memento ) )
 		{
 			try
 			{
@@ -173,4 +173,9 @@ public class SourceUtils
 		}
 		return (ICSourceLocation[])sourceLocations.toArray( new ICSourceLocation[sourceLocations.size()] );
 	}
+
+	private static boolean isEmpty( String string )
+	{
+		return ( string == null || string.trim().length() == 0 );
+	}
 }