[luis999]

Creo que debes incluir el campo CHARG, en el select

SELECT werks lgort matnr CHARG j_3asize
clabs AS labst
cinsm AS insme
cspem AS speme
APPENDING TABLE ti_stock
FROM mchb
FOR ALL ENTRIES IN t_batch
WHERE matnr = t_batch-matnr
AND werks = t_batch-werks
AND lgort = l_lgort.