PO quantity which will be delivered in X days...

Hello folks,

i want to select to quantity of purchase orders, which will be delivered in the next X days (X = parameter).

I have a loop which selects materials. For each material i do:

liefdat = SY-DATUM.
ADD D_DAYS TO liefdat.

SELECT MAX( EKET~EINDT ) EKPO~MENGE INTO (maxdat, liefm)
    FROM EKPO
    INNER JOIN EKET ON
        EKPO~EBELN = EKET~EBELN
    AND EKPO~EBELP = EKET~EBELP
  WHERE EINDT <= liefdat
    AND EKPO~LOEKZ <> 'L'
    AND EKPO~MATNR = l_best-matnr
  GROUP BY EKPO~MENGE.

liefdat is CHAR8

liefm is QUANT_13

I always get an error, that the selected fields don't fit in the target fields.

can anybody help?

Thanks in advance,

Ph.