Copying from multiple workbooks to single workbook Excel VBA - excel

Question

I have multiple workbooks in a single folder. All the workbooks share the same format and I wish to copy from the same range on the first worksheet in all workbooks and add this to a single worksheet of a newly created workbook.
The code so far:
Sub OpenAllCompletedFilesDirectory()
Dim Folder As String, FileName As String
Folder = "pathway..."
FileName = Dir(Folder & "\*.xlsx")
Do
Dim currentWB As Workbook
Set currentWB = Workbooks.Open(Folder & "\" & FileName)
CopyDataToTotalsWorkbook currentWB
FileName = Dir
Loop Until FileName = ""
End Sub
Sub AddWorkbook()
Dim TotalsWorkbook As Workbook
Set TotalsWorkbook = Workbooks.Add
outWorkbook.Sheets("Sheet1").Name = "Totals"
outWorkbook.SaveAs FileName:="pathway..."
End Sub
Sub CopyDataToTotalsWorkbook(argWB As Workbook)
Dim wsDest As Worksheet
Dim lDestLastRow As Long
Dim TotalsBook As Workbook
Set TotalsBook = Workbooks.Open("pathway...")
Set wsDest = TotalsBook.Worksheets("Totals")
Application.DisplayAlerts = False
lDestLastRow = wsDest.Cells(wsDest.Rows.Count, "A").End(xlUp).Offset(1).Row
argWB.Worksheets("Weekly Totals").Range("A2:M6").Copy
wsDest.Range("A" & lDestLastRow).PasteSpecial
Application.DisplayAlerts = True
TotalsBook.Save
End Sub
This works - to a point. It does copy the correct ranges across and place the results one below another on the "Totals" worksheet of the "Totals" workbook, but it raises a 'Subscript out of range' error on:
argWB.Worksheets("Weekly Totals").Range("A2:M6").Copy
after data from the last workbook has been pasted.
How can I tidy this code so that it works without error?
I imagine there is scope to improve the code too.

Answer 1

I'd maybe do something like this.
Note you can just open the summary workbook once before looping over the files.
Sub SummarizeFiles()
'Use `Const` for fixed values
Const FPATH As String = "C:\Test\" 'for example
Const TOT_WB As String = "Totals.xlsx"
Const TOT_WS As String = "Totals"
Dim FileName As String, wbTot As Workbook, wsDest As Worksheet
'does the "totals" workbook exist?
'if not then create it, else open it
If Dir(FPATH & TOT_WB) = "" Then
Set wbTot = Workbooks.Add
wbTot.Sheets(1).Name = TOT_WS
wbTot.SaveAs FPATH & TOT_WB
Else
Set wbTot = Workbooks.Open(FPATH & TOT_WB)
End If
Set wsDest = wbTot.Worksheets(TOT_WS)
FileName = Dir(FPATH & "*.xlsx")
Do While Len(FileName) > 0
If FileName <> TOT_WB Then 'don't try to re-open the totals wb
With Workbooks.Open(FPATH & FileName)
.Worksheets("Weekly Totals").Range("A2:M6").Copy _
wsDest.Cells(wsDest.Rows.Count, "A").End(xlUp).Offset(1)
.Close False 'no changes
End With
End If
wbTot.Save
FileName = Dir 'next file
Loop
End Sub