Bug 173236 NPE is thrown when opening a design file that is created by a higher version BIRT
1. New a report, switch to xml-source view. 2. Edit the version number in line 2, from 3.2.10 to 3.2.11 and save. 3. Close the report and reopen it. The xml-source view is opened automatically. Switch to lay-out view, there's an error message window, and NPE is thrown in error-log view. When user is trying to open a design file that is created by a higher version BIRT, model will throw an exception and stop parsing the report design file. UI should 1. Prevent the NPE 2. Telling user that he is using a higher version design file that this build does not support. (Catch the exception and reflect the message in the exception to end user)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ErrorDetail.java
description.append( " (Element = " ); 
			description.append( e.getElement( ).getElementName( ) );
			description.append( ", Name = " ); 
			description.append( e.getElement( ).getName( ) );
			description.append( "), " ); 
		}
		description.append( e.getClass( ).getName( ) );
		description.append( " (" ); 
		if ( e instanceof SemanticError )
		{
			int level = ( (SemanticError) e ).getErrorLevel( );
			if ( level == SemanticError.ERROR )
				description.append( "level = error, " ); 					
			else if ( level == SemanticError.WARNING )
				description.append( "level = warning, " ); 
		}
		description.append( "code = " ); 
		description.append( e.getErrorCode( ) );
		description.append( ", " ); 
		description.append( "message : " ); 
		description.append( e.getMessage( ) );
		description.append( ")" ); 
	}
	/**
	 * Translates <code>SAXParseException</code>.
	 * 
	 * @param e
	 *            exception to translate
	 */
	private void translate( SAXParseException e )