DOWN MAX with HEX ON positions incorrect

Hi George !
DOWN MAX with HEX ON positions to line 3 Pages from BOTTOM or is noop if less then 3 pages .
Code with comment in DOWN MAX doesn't Divide for HexMode .

METHOD  pCmdDOWN(pCmd AS STRING)

     TopScrn = me.CRPFwd(%mVisible, TopScrn, ScrAmt)             ' Move TopScrn by scroll amount

     IF ScrCmd = "M" OR ScrCmd = "MAX" THEN                      ' If down max, backup by one screen

'        TopScrn = me.CRPBack(%mVisible, TopScrn, gwScrHeight - 3 - Prf.Cols)

        ScrAmt = gwScrHeight - 3 - Prf.Cols                      ' Do a full page

        ScrAmt = ScrAmt \ Prf.HexMode                            ' Adjust for Hex

        TopScrn = me.CRPBack(%mVisible, TopScrn, ScrAmt)

     END IF                                                      '


 Hope that is an easy one .
Thanks