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
if ( e instanceof XMLParserException )
		{
			translate( (XMLParserException) e );
		}
		else if ( e instanceof DesignParserException )
		{
			translate( (DesignParserException) e );
		}
		else if ( e instanceof SemanticException )
		{
			translate( (SemanticException) e );
		}
		else if ( e instanceof SAXParseException )
		{
			translate( (SAXParseException) e );
		}
		else if ( e instanceof SAXException )
		{
			translate( (SAXException) e );
		}
		else if ( e instanceof ExtendedElementException )
		{
			translate( (ExtendedElementException) e );
		}
		else if ( e instanceof ParserConfigurationException
				|| e instanceof IOException )
		{
			assert false;
		}
		else