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/AbstractQueryExportActionHandler.java
{
			String instanceID = operation.getTarget().getId();
			String instanceType = operation.getTarget().getType().getValue();
			InputOptions options = new InputOptions( );
			options.setOption( InputOptions.OPT_REQUEST, context.getRequest( ) );
			
				
			
			if(instanceID.equals("Document"))
				exportedResultSets = getReportService( ).getResultSetsMetadata(
						docName, options );
			else
				exportedResultSets = getReportService( ).getResultSetsMetadata(
						docName, instanceID, options ); 
			if ( exportedResultSets == null )
			{
				
				AxisFault fault = new AxisFault( );
				fault.setFaultReason( "no result sets available." ); 
				throw fault;
			}
			ResultSet[] resultSetArray = getResultSetArray( exportedResultSets );
			ResultSets resultSets = new ResultSets( );
			resultSets.setResultSet( resultSetArray );
			handleUpdate( resultSets );
		}
		catch ( ReportServiceException e )
		{
			AxisFault fault = new AxisFault( );
			fault.setFaultString( e.getLocalizedMessage( ) );