Copying from one sheet to another sheet...

I just want to copy the value of the below range

 With ActiveSheet
                
        .Range("A1:Y" & .Cells(.Rows.Count, "F").End(xlDown).Row).Select
        Selection.Copy
        
      End With

dim ads worksheet
Set ads = wb.Worksheets("XAMPP")

and paste it to the other workbook, sheet name "XAMPP"in the last row of Column A.

ads.Range("A" & Rows.Count).End(xlUp).Offset(1).PasteSpecial xlPasteAll

I'm getting an error "Application-defined or object-defined error" in the highlighted line above.


"wb" is declared as global.

Public wb As Workbook