コードがついに機能しました。ピボットキャッシュを追加/作成する代わりに、PivotTableWizard を使用しました。
以下は私のコードです。使用範囲を選択するための関数 .UsedRange も見つかりました
Public Sub CountingRows()
Dim ws As Worksheet
Dim SheetName As String 'data sheet name
Dim TotalRows As Integer 'counts total number of rows
Dim TotalColumns As Integer 'sets total number of columns
Dim Counter As Integer 'Counter to start the loop
Dim wsPivot As Worksheet
Dim CreatePt As PivotTable 'creates using pivot table wizard
Dim CurrentViewPt As PivotTable
Dim PRange As Range
Dim PTCache As PivotCache
Dim PF As PivotField
'Deleting sheet if it already exists
For Each ws In ThisWorkbook.Worksheets
If ws.Name = "PivotTest1" Then
ws.Delete
End If
Next
'Setting sheet names
SheetName = "Sheet 1" 'storing sheet name which will be default
Set ws = Worksheets(SheetName)
Sheets.Add.Name = "PivotTest1"
Set wsPivot = Worksheets("PivotTest1")
wsPivot.Select 'Activating worksheet
'Delete any prior pivot tables
On Error Resume Next
For Each CurrentViewPt In wsPivot.PivotTables
CurrentViewPt.TableRange2.Clear
Next CurrentViewPt
'Defining pivot table cache
ws.Select
TotalColumns = ws.Cells(1, Columns.Count).End(xlToLeft).Column 'Counting total columns
TotalRows = ws.Range("A:A").Cells.SpecialCells(xlCellTypeConstants).Count 'Counting total rows
Set PRange = ws.UsedRange 'found a new function to use do not need to use above fields, but keeping them just incase
'Set PRange = ws.Cells(1, 1).Resize(TotalRows, TotalColumns)<<<Not sure if it works>>>
wsPivot.Select
Set PTCache = ActiveWorkbook.PivotCaches.Create(SourceType:=xlDatabase, SourceData:=PRange)
'Create the Pivot Table
Set CreatePt = wsPivot.PivotTableWizard(SourceType:=xlDatabase, SourceData:=PRange, TableDestination:=wsPivot.Range("B4"), TableName:="CurrentNBI")
Set CurrentViewPt = wsPivot.PivotTables("CurrentNBI")
'**** Define the layout of the pivot table****
With CurrentViewPt.PivotFields("NBI_CODE")
.Orientation = xlRowField
.Position = 1
End With
With CurrentViewPt.PivotFields("CREATION_DATE")
.Orientation = xlRowField
.Position = 2
End With
With CurrentViewPt.PivotFields("BUSINESS_AREA")
.Orientation = xlRowField
.Position = 3
End With
With CurrentViewPt.PivotFields("CASE_CLASSIFICATION")
.Orientation = xlRowField
.Position = 4
End With
With CurrentViewPt.PivotFields("BOOKING_CENTER")
.Orientation = xlRowField
.Position = 5
End With
With CurrentViewPt.PivotFields("LOCATION")
.Orientation = xlRowField
.Position = 6
End With
With CurrentViewPt.PivotFields("INITIATIVE_NAME")
.Orientation = xlRowField
.Position = 7
End With
With CurrentViewPt.PivotFields("BRIEF_DESCRIPTION")
.Orientation = xlRowField
.Position = 8
End With
With CurrentViewPt.PivotFields("TARGET_ASSESSMENT_DATE")
.Orientation = xlRowField
.Position = 9
End With
With CurrentViewPt.PivotFields("ASSESSMENT_COMPLETION_DATE")
.Orientation = xlRowField
.Position = 10
End With
With CurrentViewPt.PivotFields("NBI_CODE")
.Orientation = xlDataField
.Position = 1
.xlCount = True
End With
'Setting sub-totals to zero
ActiveSheet.PivotTables("CurrentNBI").PivotFields("NBI_CODE").Subtotals = _
Array(False, False, False, False, False, False, False, False, False, False, False, False)
ActiveSheet.PivotTables("CurrentNBI").PivotFields("CREATION_DATE").Subtotals = _
Array(False, False, False, False, False, False, False, False, False, False, False, False)
ActiveSheet.PivotTables("CurrentNBI").PivotFields("BUSINESS_AREA").Subtotals = _
Array(False, False, False, False, False, False, False, False, False, False, False, False)
ActiveSheet.PivotTables("CurrentNBI").PivotFields("CASE_CLASSIFICATION").Subtotals = _
Array(False, False, False, False, False, False, False, False, False, False, False, False)
ActiveSheet.PivotTables("CurrentNBI").PivotFields("BOOKING_CENTER").Subtotals = _
Array(False, False, False, False, False, False, False, False, False, False, False, False)
ActiveSheet.PivotTables("CurrentNBI").PivotFields("LOCATION").Subtotals = _
Array(False, False, False, False, False, False, False, False, False, False, False, False)
ActiveSheet.PivotTables("CurrentNBI").PivotFields("INITIATIVE_NAME").Subtotals = _
Array(False, False, False, False, False, False, False, False, False, False, False, False)
End Sub