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/AbstractGetCascadeParameterActionHandler.java
for ( int i = 0; i < params.length; i++ )
		{
			Oprand param = params[i];
			paramMap.put( param.getName( ), param.getValue( ) );
		}
		InputOptions options = new InputOptions( );
		options.setOption( InputOptions.OPT_REQUEST, context.getRequest( ) );
		IViewerReportDesignHandle designHandle = new BirtViewerReportDesignHandle(
				null, reportDesignName );
		Map cascParamMap = null;
		try
		{
			cascParamMap = getParameterSelectionLists( designHandle, paramMap,
					options );
		}
		catch ( ReportServiceException e )
		{
			
			AxisFault fault = new AxisFault( );
			fault.setFaultCode( new QName( "TODO" ) ); 
			fault.setFaultString( e.getMessage( ) );
			throw fault;
		}
		/**
		 * prepare response.
		 */
		CascadeParameter cascadeParameter = new CascadeParameter( );
		if ( cascParamMap != null && cascParamMap.size( ) > 0 )
		{
			SelectionList[] selectionLists = new SelectionList[cascParamMap