Bug 145724 Change version after auto convert
By the request of 136536, user get warning message to confirm the auto convert. If user select yes, the file convert to newest format, but the version is still old. If user open this file again, he'll get the warning message even the file converted.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/ModelUtil.java
if ( errorCode == LibraryException.DESIGN_EXCEPTION_LIBRARY_INCLUDED_RECURSIVELY
							|| errorCode == LibraryException.DESIGN_EXCEPTION_DUPLICATE_LIBRARY_NAMESPACE )
					{
						return parserException.getException( );
					}
				}
			}
		}
		return null;
	}
	/**
	 * Checks whether the input stream has a compatible encoding signature with
	 * BIRT. Currently, BIRT only supports UTF-8 encoding.
	 * 
	 * @param inputStream
	 *            the input stream to check
	 * @param fileName
	 *            the design file name
	 * @return the signature from the UTF files.
	 * @throws IOException
	 *             if errors occur during opening the design file
	 * @throws SAXException
	 *             if the stream has unexpected encoding signature
	 */
	public static String checkUTFSignature( InputStream inputStream,
			String fileName ) throws IOException, SAXException
	{
		
		
		String encoding = UnicodeUtil.checkUTFSignature( inputStream );