DEF VAR dvonDatum       AS DATE INIT 01/01/2020.    /*  Altes Inventardatum */
DEF VAR dbisDatum       AS DATE INIT 05/01/2020.    /*  Neues Inventardatum */

DEF TEMP-TABLE tArtst
    FIELD Firma     AS CHAR
    FIELD Artnr     AS INT
    FIELD Inhalt    AS INT
    FIELD Jahr      AS INT
    FIELD Inventar  AS DEC
    FIELD Eingang   AS DEC
    FIELD Ausgang   AS DEC
    FIELD Bestand   AS DEC
    
    INDEX tArtst-k1 IS PRIMARY
        Firma
        Artnr
        Inhalt
        Jahr.
        
FOR EACH ArtLager
        WHERE ArtLager.Firma     = '1000'
        AND   ArtLager.Datum_Inv = dvonDatum:
    CREATE  tArtst.
    BUFFER-COPY ArtLager
        USING   Firma Artnr Inhalt Jahr
        TO      tArtst.
END.

FOR EACH tArtst:
    FIND Artst NO-LOCK OF tArtst.
    IF NOT Artst.Aktiv THEN NEXT.
    
    FOR EACH Artbw NO-LOCK USE-INDEX Artbw-k2
            WHERE Artbw.Firma    = Artst.Firma
            AND   Artbw.Artnr    = Artst.Artnr
            AND   Artbw.Inhalt   = Artst.Inhalt
            AND   Artbw.Jahr     = Artst.Jahr
            AND   Artbw.Lag_Buch = TRUE
            AND   Artbw.Lager    = 0
            AND   Artbw.Datum   >= dvonDatum
            AND   Artbw.Datum   <= (dbisDatum - 1):
            
        DO WHILE TRUE:
            IF Artbw.Tr_Art < 11 THEN DO:
                tArtst.Ausgang = tArtst.Ausgang + Artbw.Menge.
                LEAVE.
            END.
            IF Artbw.Tr_Art < 21 THEN DO:
                tArtst.Eingang = tArtst.Eingang + Artbw.Menge.
                LEAVE.
            END.
            tArtst.Inventar = tArtst.Inventar   + Artbw.Menge.
            LEAVE.
        END.
    END.
END.

FOR EACH tArtst:
    FIND ArtLager
            WHERE ArtLager.Firma  = tArtst.Firma
            AND   ArtLager.Artnr  = tArtst.Artnr
            AND   ArtLager.Inhalt = tArtst.Inhalt
            AND   ArtLager.Jahr   = tArtst.Jahr
            AND   ArtLager.Lager  = 0.
    ASSIGN  ArtLager.Datum_Inv   = dbisDatum
            ArtLager.Bestand_alt = tArtst.Inventar + tArtst.Eingang - tArtst.Ausgang
            ArtLager.Bestand     = 0.
END.