Bug 132914 "Invalid page number" error message is hard coded.
"Invalid page number" error message is hard coded in DocumentProcessor.java. This must be externalized into *.properties file. If there are other hard coded error messages, please also externalize.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/actionhandler/AbstractGetPageActionHandler.java
* 
	 * @param bean
	 * @return
	 */
	abstract protected String __getReportDocument( );
	
	/**
	 * 
	 * @param docName
	 * @throws RemoteException
	 */
	abstract protected void __checkDocumentExists( ) throws RemoteException;
	
	/**
	 * 
	 * @param context
	 * @param operation
	 * @param response
	 */
	public AbstractGetPageActionHandler( IContext context, Operation operation,
			GetUpdatedObjectsResponse response )
	{
		super( context, operation, response );
	}
	protected void __execute( ) throws RemoteException
	{
		try
		{
			prepareParameters( );
			doExecution( );