GetDataBufferUsingFormula not getting data when refering to a different scenario and time

Imports System
Imports System.Collections.Generic
Imports System.Data
Imports System.Data.Common
Imports System.Globalization
Imports System.IO
Imports System.Linq
Imports System.Windows.Forms
Imports Microsoft.VisualBasic
Imports OneStream.Finance.Database
Imports OneStream.Finance.Engine
Imports OneStream.Shared.Common
Imports OneStream.Shared.Database
Imports OneStream.Shared.Engine
Imports OneStream.Shared.Wcf
Imports OneStream.Stage.Database
Imports OneStream.Stage.Engine

Namespace OneStream.BusinessRule.Finance.MF_Copy
	Public Class MainClass
		Public Function Main(ByVal si As SessionInfo, ByVal globals As BRGlobals, ByVal api As FinanceRulesApi, ByVal args As FinanceRulesArgs) As Object
			Try
	
				Dim bLogEnabled As Boolean = True					'Change to true only in development for logging values
				Dim strLogName As String = Me.GetType.Namespace		'Uniquely identifies where the log is coming from, no change required. Get the name from the current namespace for identification of log entry
				Dim sbLogMessage As New System.Text.StringBuilder	'Holds the log - use appendline to add to the logstring
				sbLogMessage.appendline ("*** Log ***")				'Header for easy finding log entries
				
				Select Case api.FunctionType
					
					Case Is = FinanceFunctionType.CustomCalculate

						If args.CustomCalculateArgs.FunctionName.XFEqualsIgnoreCase("CopyETC_Actual_Test") Then
						'-------------------------------------------------------------------------
						'---CopyETC_Actual_Test---Start
						'-------------------------------------------------------------------------
							sbLogMessage.appendline ("CopyETC_Actual_Test")
							sbLogMessage.appendline ("POV:" & api.Pov.Entity.Name & "_" & api.Pov.Scenario.Name & "_" & api.Pov.Time.Name)

							'Run for base Entities and local currency only
							If ((Not api.Entity.HasChildren()) And (api.Cons.IsLocalCurrencyforEntity())) Then
																
								'Copy data
								sbLogMessage.AppendLine("CopyData")
								'Dim databuffer As DataBuffer = api.Data.GetDataBufferUsingFormula("FilterMembers(T#2023M6,S#Actual,A#AC890000.Base,F#None,U1#PR999998.Base,U1#None,U2#EQ0599.Base,U2#None,U3#None,U4#None,U5#Tot_Reporting.Base,U6#None,U7#None,U8#Actual)",,False)
								'Dim databuffer As DataBuffer = api.Data.GetDataBufferUsingFormula("FilterMembers(S#Actual,A#AC890000.Base,F#None,U1#PR999998.Base,U1#None,U2#EQ0599.Base,U2#None,U3#None,U4#None,U5#Tot_Reporting.Base,U6#None,U7#None,U8#Actual)",,False)
								Dim databuffer As DataBuffer = api.Data.GetDataBufferUsingFormula("FilterMembers(T#2023M6,A#AC890000.Base,F#None,U1#PR999998.Base,U1#None,U2#EQ0599.Base,U2#None,U3#None,U4#None,U5#Tot_Reporting.Base,U6#None,U7#None,U8#Actual)",,False)
								
								If Not databuffer Is Nothing Then
									For Each SourceCell As databuffercell In databuffer.DataBufferCells.Values
										If Not SourceCell Is Nothing And SourceCell.CellAmount <> 0 Then
											
											Dim sSourceMemberscript As String = sourcecell.DataBufferCellPk.GetMemberScript(api)
											sbLogMessage.AppendLine("CalculatedCell: " & sSourceMemberscript)
																						
										End If
									Next
								End If

							End If
						'-------------------------------------------------------------------------
						'---CopyETC_Actual_Test---End
						'-------------------------------------------------------------------------
						End If
						
				End Select
				
				If bLogEnabled Then brapi.ErrorLog.LogMessage(si,strLogName,sbLogMessage.ToString)
				
				Return Nothing
				
			Catch ex As Exception
				Throw ErrorHandler.LogWrite(si, New XFException(si, ex))
			End Try
		End Function
	End Class
End Namespace

This is the finance rule with the test custom calc. The code is used for testing and it prints out in the error log the combinations found by the getdatabufferusingformula.

Now, I have a data management step, here run from Actual 2023M12.

The getdatabufferusingformula, which is pointing to T#2023M6, can get some data.

Dim databuffer As DataBuffer = api.Data.GetDataBufferUsingFormula("FilterMembers(S#Actual,A#AC890000.Base,F#None,U1#PR999998.Base,U1#None,U2#EQ0599.Base,U2#None,U3#None,U4#None,U5#Tot_Reporting.Base,U6#None,U7#None,U8#Actual)",,False)

and run the data management step from MF7 2023M6

I get the same data combinations as before

However, if I put the 2 things together and change the getdatabufferusingformula to point to S#Actual T#2023M6

Dim databuffer As DataBuffer = api.Data.GetDataBufferUsingFormula("FilterMembers(T#2023M6,S#Actual,A#AC890000.Base,F#None,U1#PR999998.Base,U1#None,U2#EQ0599.Base,U2#None,U3#None,U4#None,U5#Tot_Reporting.Base,U6#None,U7#None,U8#Actual)",,False)

and run the data management step from MF7 2023M12

I get no data

What am I doing wrong? Thank you

Thank you, I have tested it and this solves my issue. I really appreciate you help.