Account XXXXXX requires an assignment to a CO object in MIGO

Hi Experts,

I am creating Good receipt purchase order. When posting i got the error message - "Account xxxxxx requires an assignment to a CO object".

For this I read on the forum that I need to check that we need to check the cost object in OKB9.

So i am trying to use user exit of CO substitution (for CO validation) with following conditions:

1. Check EKPO-BSTYP = 'F'

2. If EKPO-KNTTP = F

       THEN assign CO as Order = EKKN-AUFNR (Order)

3. If EKPO-KNTTP = N (network)

       THEN assign CO as Network EKKN-NPLNR  AND Activity Number

4. If EKPO-KNTTP = K (Cost Center)

       THEN assign CO as Cost Center  = EKKN-KOSTL

5. If EKPO-KNTTP = A (Asset)

       THEN assign CO as Cost Center  = EKKN-PRCTR

Still i am getting the same error. Please guide me anyone for this issue.

Thanks.

Viji.