1st i created AC01 service master
step 2:created ME21N purchase order with account assign cat K and Item cat D and fill the service no in item level then unchecked GR base Invoice.save the po
step 3: created ML81N service entry sheet with help of PO num
step 4 doing MIRO wen click the simulate then POST icon is not displaying and i also assign val class to G/L account and without Val class WRX in account determination 