Hi guys,
could you pls have a look at my code and let me know why i keep getting this error msg every time i try to execute it?

Thanks so much,
Maria

Sub CommandButtonDRG_Click()


Dim i As Integer
Dim curCell As Date
Dim startDate As Date
Dim endDate As Date

Dim SheetNumber As Integer

SheetNumber = "949"

startDate = Sheets(SheetNumber).Range("c2").Value
endDate = Sheets(SheetNumber).Range("e2").Value
Sheets(SheetNumber).Columns("C:C").Select
Selection.NumberFormat = "m/d/yyyy"

Sheets(SheetNumber).Range("c2").Select
ActiveCell.FormulaR1C1 = startDate

i = 3
Do
curCell = Sheets(SheetNumber).Cells(i, 3).Select
ActiveCell.FormulaR1C1 = "=dvstradedate(R[-1]C,1)"
i = i + 1
Loop Until Sheets(SheetNumber).Cells(i - 1, 3).Value = endDate
End

End Sub