Error in Business Process

I am getting meaningless Compilation errors , any ideawhat it is about ? 

namespace Terrasoft.Core.Process
{
 
	using System;
	using System.Collections.Generic;
	using System.Collections.ObjectModel;
	using System.Drawing;
	using System.Globalization;
	using System.Text;
	using Terrasoft.Common;
	using Terrasoft.Configuration;
	using Terrasoft.Core;
	using Terrasoft.Core.Configuration;
	using Terrasoft.Core.DB;
	using Terrasoft.Core.Entities;
	using Terrasoft.Core.Process;
	using Terrasoft.Core.Process.Configuration;
	using Terrasoft.UI.WebControls.Utilities;
 
	#region Class: UsrProcess_7b09d28TravelAgencyDev1MethodsWrapper
 
	/// <exclude/>
	public class UsrProcess_7b09d28TravelAgencyDev1MethodsWrapper : ProcessModel
	{
 
		public UsrProcess_7b09d28TravelAgencyDev1MethodsWrapper(Process process)
			: base(process) {
			AddScriptTaskMethod("ScriptTask2Execute", ScriptTask2Execute);
			AddScriptTaskMethod("ScriptTask3Execute", ScriptTask3Execute);
			AddScriptTaskMethod("ScriptTask4Execute", ScriptTask4Execute);
		}
 
		#region Methods: Private
 
		private bool ScriptTask2Execute(ProcessExecutingContext context) {
			string sender="AutoAddVisits";
			string msgbody="something";
			MsgChannelUtilities.PostMessage(UserConnection,sender,msgbody);
			return true;
		}
 
		private bool ScriptTask3Execute(ProcessExecutingContext context) {
			var frequency="frequencyInDays";
			switch (frequency) {
			         case "Daily":
			            Set(frequency, 1);
			                        break;
			                    case "Weekly":
			                        Set("frequency", 7);
			                        break;
			                    case "Monthly":
			                        Set("frequency", 30);
			                        break;
			                    default:
			                       break;
			 }
			return true;
		}
 
		private bool ScriptTask4Execute(ProcessExecutingContext context) {
			var travelOfferId = "TravelId"; 
			var travelOfferSchemaName = "TravelOffers";
			var travelOfferEsq = new EntitySchemaQuery(UserConnection.EntitySchemaManager, travelOfferSchemaName);
			travelOfferEsq.addColumn("TravelOfferFrequency");
			var travelOffer = travelOfferEsq.getEntity(travelOfferId);
 
			var tourSchemaName = "Tours";
			var tourEsq = new EntitySchemaQuery(UserConnection.EntitySchemaManager, tourSchemaName);
			var tourCollection = new Collection();
 
			var currentDate = new Date();
			var firstTour = tourCollection.add(tourEsq.createEntity(UserConnection));
			firstTour.set("TravelOffer", travelOfferId);
			firstTour.set("TourDate", currentDate);
 
			var travelOfferFrequency = travelOffer.get("UsrTravelOfferFrequencyId").displayValue;
			var tourDate = currentDate;
			for (var i = 1; i < 8; i++) {
			    switch (travelOfferFrequency) {
			        case "Daily":
			            tourDate.setDate(tourDate.getDate() + 1);
			            break;
			        case "Weekly":
			            tourDate.setDate(tourDate.getDate() + 7);
			            break;
			        case "Monthly":
			            tourDate.setDate(tourDate.getDate() + 30);
			            break;
			        default:
			            throw new UnknownException("Invalid travel offer frequency");
			    }
			    var tour = tourCollection.add(tourEsq.createEntity(UserConnection));
			    tour.set("TravelOffer", travelOfferId);
			    tour.set("TourDate", tourDate);
			}
 
			tourCollection.saveAll({
			    isExternal: true,
			    success: function() {
			        // The tour entities have been saved
			    },
			    failure: function() {
			        // An error occurred while saving the tour entities
			    }
			});
		}
 
		#endregion
 
	}
 
	#endregion
 
}