Copy Sheet1 of multiple workbooks to one new workbook - excel

Question

I have 99 workbooks in a folder. I want to copy sheet1 from each into a new workbook. It doesn't matter what order as long as each workbook/sheet1 goes onto a new worksheet in the destination workbook.
I have written a code, and tried to sample other codes. No matter what it will only copy sheet1 of the first 10 workbooks.
How can this work on all the workbooks in the folder? My goal is to get the sheets together so I can merge certain cells into a summary sheet.
I put this code into a module on my destination workbook.
Sub combineWorkbooks()
Path = "C:\Users\james\OneDrive\Desktop\Invoices Jones UK Group\Paid\JJ0001-JJ0099\"
fileName = Dir(Path & "*.xls") Do While fileName <> ""
Workbooks.Open fileName:=Path & fileName, ReadOnly:=True
For Each sheet In ActiveWorkbook.Sheets
sheet.Copy After:=ThisWorkbook.Sheets(1)
Next sheet
Workbooks(fileName).Close
fileName = Dir() Loop
End Sub

Answer 1

EDIT: this should prevent any issues trying to copy multiple sheets with the same name into the workbook.
Sub combineWorkbooks()
Dim Path, fileName, sheetNum As Long, sheetName As String
Path = "C:\Users\james\OneDrive\Desktop\Invoices Jones UK Group\Paid\JJ0001-JJ0099\"
fileName = Dir(Path & "*.xls")
Do While fileName <> ""
With Workbooks.Open(fileName:=Path & fileName, ReadOnly:=True)
sheetName = .Worksheets(1).Name
sheetNum = 1
'if a worksheet with the same name already exists, add
' an incrementing number until the name is unique
If WorksheetExists(sheetName) Then
Do While WorksheetExists(sheetName & sheetNum)
sheetNum = sheetNum + 1
Loop
.Worksheets(1).Name = sheetName & sheetNum 'rename if required
End If
'copy to end of sheets
.Worksheets(1).Copy After:=ThisWorkbook.Sheets(ThisWorkbook.Sheets.Count)
.Close
End With
fileName = Dir()
Loop
End Sub
Function WorksheetExists(shtName As String, Optional wb As Workbook) As Boolean
Dim sht As Worksheet
If wb Is Nothing Then Set wb = ThisWorkbook
On Error Resume Next
Set sht = wb.Sheets(shtName)
On Error GoTo 0
WorksheetExists = Not sht Is Nothing
End Function
If you're still getting only 10 files then maybe it's an issue with the file names/extensions?
Edit - try listing all of the files:
Dim Path, fileName
Path = "C:\Users\james\OneDrive\Desktop\Invoices Jones UK Group\Paid\JJ0001-JJ0099\"
fileName = Dir(Path & "*")
Do While fileName <> ""
Debug.Print fileName
fileName = Dir()
Loop
What output do you get?

Answer 2

It was a file name extension, as you thought.
I now have this working.
Sub CombineFiles()
Dim Path As String
Dim FileName As String
Dim Wkb As Workbook
Dim WS As Worksheet
Application.EnableEvents = False
Application.ScreenUpdating = False
Path = "C:\Users\james\OneDrive\Desktop\Invoices Jones UK Group\Paid\JJ0800-JJ0899" 'Change as needed
FileName = Dir(Path & "\*.xlsx", vbNormal)
Do Until FileName = ""
Set Wkb = Workbooks.Open(FileName:=Path & "\" & FileName)
For Each WS In Wkb.Worksheets
WS.Copy After:=ThisWorkbook.Sheets(ThisWorkbook.Sheets.Count)
Next WS
Wkb.Close False
FileName = Dir()
Loop
Application.EnableEvents = True
Application.ScreenUpdating = True
End Sub