I need to insert tab name in cell A1 of every tab with changing tab names - vba

Question

I need to open a worksheet with a fixed name and insert the name of each tab (which will change according to the current date) at the top of the sheet.
I modified some code from a previous answer and had the code working when it did not include the code to open the workbook. Now it flicks through the tabs but doesn't insert the name into Cells(1, 1) and I have no idea why. It also bugs at the end: Run-time error 91, which is less problematic but would be good to fix.
Any tips or advice much appreciated. Below is my current code:
Sub PSOPENTAB()
ChDir "G:\directory"
Workbooks.Open Filename:="G:\directory\filename.xls"
Windows("filename.xls").Activate
ActiveWorkbook.Worksheets(1).Activate
Call nametop
End Sub
Sub nametop()
Dim i As Long
With ThisWorkbook
'exit if Activesheet is the last tab
If .ActiveSheet.Index + 1 > .Worksheets.Count Then
Exit Sub
End If
For i = .ActiveSheet.Index To .Worksheets.Count - 1
.ActiveSheet.Cells(1, 1) = .Worksheets(i).Name
ActiveSheet.Next.Select
Next i
End With
End Sub

Answer 1

You need to reference your objects correctly.
Your problems are:
You use Thisworkbook in your nametop routine. So it will always work on the workbook containing the code.
You can change it to ActiveWorkbook but that may lead you to other problems in the future. See this cool stuff to know more about why to avoid Activeworkbook/Activesheet and the like
Applying what's discussed there, try below code:
Sub PSOPENTAB()
Dim wb As Workbook
Set wb = Workbooks.Open(Filename:="G:\directory\filename.xls")
nametop wb
End Sub
Sub nametop(wb As Workbook)
Dim ws As Worksheet
For Each ws In wb.Worksheets
ws.Cells(1, 1) = ws.Name
Next ws
End Sub
Above code adds the name of the sheet in Cell A1 of every sheet.
Is this what you're trying?