Issue with Extensibility Rule in C# using FdxExecuteDataUnit

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Globalization;
using System.IO;
using System.Linq;
using Microsoft.CSharp;
using OneStream.Finance.Database;
using OneStream.Finance.Engine;
using OneStream.Shared.Common;
using OneStream.Shared.Database;
using OneStream.Shared.Engine;
using OneStream.Shared.Wcf;
using OneStream.Stage.Database;
using OneStream.Stage.Engine;

namespace OneStream.BusinessRule.Extender.TEST_FDX_Csharp
{
public class MainClass
	{
		public object Main(SessionInfo si, BRGlobals globals, object api, ExtenderArgs args)
		{
			try
			{
				DataTable employeeData = CreateSampleData();
				AppServerConfigSettings configSettings = AppServerConfig.GetSettings(si);
				string folderPath = FileShareFolderHelper.GetDataManagementExportUsernameFolderForApp(si, true, configSettings.FileShareRootFolder, si.AppToken.AppName) + "\\" + DateTime.UtcNow.ToString("yyyyMMdd") + "\\Extracts";
				Directory.CreateDirectory(folderPath);
				string filePath = folderPath + "\\AppTypes.xml";
//				File.Delete(filePath);
//				File.WriteAllText(filePath, outer.accountRecs.ToString());
				string fileName = "OneStream_MassDataExtract.txt";
				
				// Write text file
				ExportDataTableToFile(employeeData,"    ", folderPath+fileName);
								
				switch (args.FunctionType)
				{
					case ExtenderFunctionType.Unknown:
						break;
					case ExtenderFunctionType.ExecuteDataMgmtBusinessRuleStep:
						break;
					case ExtenderFunctionType.ExecuteExternalDimensionSource:
						// Add External Members
						var externalMembers = new List<NameValuePair>();
						externalMembers.Add(new NameValuePair("YourMember1Name", "YourMember1Value"));
						externalMembers.Add(new NameValuePair("YourMember2Name", "YourMember2Value"));
						return externalMembers;
				}
				return null;
				
				
				string cubeName = "FinancialDetail";
				string entityMemFilter = "E#1001";
				string consName = "Local";
				int scenarioTypeId = 1;//ScenarioTypeID.Actual;
				string scenarioMemFilter = "S#Actual";
				string timeMemFilter = "T#2024M6";
				string viewName  = "YTD";
				string filter = "UD7=‘None’";
				bool suppressNoData = true;
				int parallelQueryCount = 1;
				bool logStatistics = false;
				
				DataTable dt = BRApi.Import.Data.FdxExecuteDataUnit(si, cubeName, entityMemFilter, consName, scenarioTypeId, scenarioMemFilter, timeMemFilter, viewName, suppressNoData, filter, parallelQueryCount, logStatistics);
			}
			catch (Exception ex)
			{
				throw ErrorHandler.LogWrite(si, new XFException(si, ex));
			}
		}	
	
		public void ExportDataTableToFile(DataTable datatable, string delimited, string file)
	    {
		    StreamWriter str = new StreamWriter(file, false, System.Text.Encoding.Default);
		    
			// Export columns 
	        string Columns = string.Empty;
	        foreach (DataColumn column in datatable.Columns)
	        {
	            Columns += column.ColumnName + delimited;
	        }
	        str.WriteLine(Columns.Remove(Columns.Length - 1, 1));
	    	
			// Export rows
		    foreach (DataRow datarow in datatable.Rows)
		    {
		        string row = string.Empty;
		        foreach (object items in datarow.ItemArray)
		        {
		            row += items.ToString() + delimited;
		        }
		        str.WriteLine(row.Remove(row.Length - 1, 1));
		    }
		    str.Flush();
		    str.Close();
		}
	
		// Create Sample Data
		private DataTable CreateSampleData()
		{
		    // Create a DataTable
		    DataTable employeeData = new DataTable("EmployeeData");
		    DataColumn dtColumn;
		    DataRow dtRow;			    
		
		    // Create Name column.
		    dtColumn = new DataColumn();
		    dtColumn.DataType = Type.GetType("System.String");
		    dtColumn.ColumnName = "Name";
		    dtColumn.Caption = "Name";
		    employeeData.Columns.Add(dtColumn);
			
			 // Create EmpID column.
		    dtColumn = new DataColumn();
		    dtColumn.DataType = Type.GetType("System.String");
		    dtColumn.ColumnName = "EmpID";
		    dtColumn.Caption = "EmpID";
		    employeeData.Columns.Add(dtColumn);
			
			// Create Address column.
		    dtColumn = new DataColumn();
		    dtColumn.DataType = Type.GetType("System.String");
		    dtColumn.ColumnName = "Address";
		    dtColumn.Caption = "Address";
		    employeeData.Columns.Add(dtColumn);
		
		    // Add new row
		    dtRow = employeeData.NewRow();
		    dtRow["Name"] = "Employee 1";
		    dtRow["EmpID"] = "EmpID-1";
		    dtRow["Address"] = "Bangalore, India";		    
		    employeeData.Rows.Add(dtRow);
			
			// Add new row
		    dtRow = employeeData.NewRow();
		    dtRow["Name"] = "Employee 2";
		    dtRow["EmpID"] = "EmpID-2";
		    dtRow["Address"] = "Bangalore, India";		    
		    employeeData.Rows.Add(dtRow);
		    
			// Add new row
		    dtRow = employeeData.NewRow();
		    dtRow["Name"] = "Employee 3";
		    dtRow["EmpID"] = "EmpID-3";
		    dtRow["Address"] = "Bangalore, India";		    
		    employeeData.Rows.Add(dtRow);
			
			return employeeData;
		}
	
	}
}

Thank you so much for any assistance.  I always seem to find answers to a lot of my questions here.