update custom fields of services tab of Purchase Order

[arpita_churi3]

Hi All,

I have an requirement to update custom fields of  services  data of Purchase Order.

we have 2 custom fields added under structure CI_ESLLDB. i tried passing values to BAPI_PO_CHANGE EXTENSIONIN table parameter as beloe

structure name = BAPI_TE_MEPOITEM  , VALUEPART1 = line item of PO , VALUEPART2 as CI_ESLLDB , VALUEPART3 is concatenation of service packg no and service line no and VALUEPART4 as new value and also same line is added to EXTENSIONIN for structure  BAPI_TE_MEPOITEMX.

but after BAPI execution , return parameter is NO data changed.

if anyone has updated custom fields? pls help.

Thank you

Arpita