Runtime error 13 problem with a code

Hello people I have made following code but It was a time ago...

I get error: Runtime error 13 : incompatible types

see code below

Sub CheckIND()

'IND=IND CHECK FIL;;;;;;;;;;;;;;;;;;;;;;
For I = 2 To ActiveSheet.UsedRange.SpecialCells(xlCellTypeLastCell).row
    If Cells(I, "J") = "IND" And Cells(I, "K") = "IND" And Len(Cells(I, "B")) <> 0 And Cells(I, "AB") <> 0 Then
    Cells(I, 1).EntireRow.Interior.ColorIndex = 6
    mycell = Cells(I, "B").Text
    mycellRes = mycell - 1
    DivAB = Cells(I, "AB").Text
    myTot = Round(DivAB / mycellRes)
    ValueSought = Cells(I, "A").Value
    Set FirstInstance = Columns("A").Find(what:=ValueSought, LookIn:=xlFormulas, LookAt:=xlWhole, SearchFormat:=False)
        If Not FirstInstance Is Nothing Then Set RangeToSearch = Range(FirstInstance, Cells.SpecialCells(xlCellTypeLastCell)).Columns(1)
        RangeToSearchFirstRow = FirstInstance.row
        RangeToSearchValues = RangeToSearch.Value
        Set RangeToUpdate = FirstInstance
        For j = 1 To UBound(RangeToSearchValues)
        If RangeToSearchValues(j, 1) = ValueSought Then
        Set RangeToUpdate = Union(RangeToUpdate, Cells(j - 1 + RangeToSearchFirstRow, "A"))
        End If
    Next j
    RangeToUpdate.Offset(, 19).Value = myTot
    End If
Next I
End Sub

when I see troubleshoots the problem the error is:
myTot = Round(DivAB / mycellRes)
Could someone help me ?

Thank you in advance