Hi,
could you please help me to look into the error:
Sub CopyCols()
    Application.ScreenUpdating = False
    Dim srcWB As Workbook
    Set srcWB = ThisWorkbook
    Dim desWS As Worksheet
    Set desWS = Workbooks("CombinedData.xlsx").Sheets("Sheet1")
    desWS.UsedRange.ClearContents
    Dim...