Bug 124444 Preview attached file in pdf will display nothing.
Description: Preview attached file in pdf will display nothing. Steps to reproduce: 1. Preview attached design file in pdf Expected result: Report content shows Actual result: Wait for 10 minutes but nothing showed at all
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/DteDataEngine.java
}
		assert ( false );
		return null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.data.IDataEngine#close()
	 */
	public void close( )
	{
		assert ( rsStack.size( ) > 0 );
		rsStack.removeLast( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.data.IDataEngine#shutdown()
	 */
	public void shutdown( )
	{
		assert ( rsStack.size( ) == 0 );
		engine.shutdown( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.data.IDataEngine#evaluate(org.eclipse.birt.data.engine.api.IExpression)
	 */
	public Object evaluate( IBaseExpression expr )