Bug 203026 Can not export chart to doc.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
String scriptLibDir = ParameterAccessor.scriptLibDir;
		ArrayList jarFileList = new ArrayList( );
		if ( scriptLibDir != null )
		{
			File dir = new File( scriptLibDir );
			getAllJarFiles( dir, jarFileList );
		}
		String scriptlibClassPath = ""; 
		for ( int i = 0; i < jarFileList.size( ); i++ )
			scriptlibClassPath += EngineConstants.PROPERTYSEPARATOR
					+ ( (File) jarFileList.get( i ) ).getAbsolutePath( );
		if ( scriptlibClassPath.startsWith( EngineConstants.PROPERTYSEPARATOR ) )
			scriptlibClassPath = scriptlibClassPath
					.substring( EngineConstants.PROPERTYSEPARATOR.length( ) );
		config.setProperty( EngineConstants.WEBAPP_CLASSPATH_KEY,
				scriptlibClassPath );
		config.setEngineHome( "" ); 
		
		LoggingUtil.configureLoggers( ParameterAccessor.loggers, level,
				ParameterAccessor.logFolder );
	}
	/**
	 * Get engine instance.
	 * 
	 * @return the single report engine service
	 */
	public static ReportEngineService getInstance( )
	{
		return instance;