Bug 210609 [Smoke]Crosstab is failed to preview in runtime
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/extension/ExtensionPointManager.java
catch ( CoreException e )
			{
			}
		}
	}
	private ImageDescriptor getImageDescriptor( IConfigurationElement element )
	{
		Assert.isLegal( element != null );
		IExtension extension = element.getDeclaringExtension( );
		String iconPath = element.getAttribute( IExtensionConstants.ATTRIBUTE_ICON );
		if ( iconPath == null )
		{
			return null;
		}
		URL path = Platform.getBundle( extension.getNamespace( ) )
				.getEntry( "/" ); 
		try
		{
			return ImageDescriptor.createFromURL( new URL( path, iconPath ) );
		}
		catch ( MalformedURLException e )
		{
		}
		return null;
	}
	private void loadStringAttribute( ExtendedElementUIPoint newPoint,
			IConfigurationElement element, String attributeName )
	{
		String value = element.getAttribute( attributeName );
		if ( value != null )