Bug 179629 After create a x-tab with a cube, a error occurs in Problems sheet[1102]
Description: After create a x-tab with a cube, a error occurs in Problems sheet[1102] Build number: 2.2.0.v20070328-0630 Steps to reproduce: 1, Create a cube 2, Create a x-tab using the cube 3, Check the error message in Problems sheet Expected result: No error occurs after create a x-tab Actual result: The error message is "The ExtendedItem must be able to access one data set."
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/extension/ReportItemExtensionTest.java
*             if any exception
	 */
	public void testAddExtendedItem( ) throws Exception
	{
		sessionHandle = new DesignEngine( new DesignConfig( ) )
				.newSessionHandle( (ULocale) null );
		designHandle = sessionHandle.createDesign( );
		ExtendedItemHandle itemHandle = (ExtendedItemHandle) designHandle
				.getElementFactory( ).newElement( TESTING_BOX_NAME, "box1" ); 
		designHandle.getBody( ).add( itemHandle );
		assertEquals( TESTING_BOX_NAME, itemHandle.getDefn( ).getName( ) );
		assertEquals( TESTING_BOX_NAME, ( (ExtendedItem) itemHandle
				.getElement( ) ).getExtDefn( ).getName( ) );
		assertEquals( true, ( (ExtendedItem) itemHandle.getElement( ) )
				.getExtDefn( ).hasStyle( ) );
		
		itemHandle.setProperty( "usage", "toy" ); 
		save( );
		assertTrue( compareFile( "TestingBox_golden_1.xml" ) ); 
	}
	/**
	 * Test create a child extended item base on another.
	 * 
	 * @throws Exception
	 * 
	 */
	public void testAddExtendedItem2( ) throws Exception
	{
		openDesign( fileName_7 );
		DesignElementHandle baseMatrixHandle = designHandle.getComponents( )