Can I use BAPI_ACC_DOCUMENT_POST for customer clearing(inter company)?

Question

Hi,
We were getting errors for object type. Object type is a mandatory field and it is not taking "BKPFF",  "VBRK" and other object key as a valid object key( Check is present in SAP Include LACC9F20 for object type). We have created a new object type in TTYP table and passed in this BAPI "BAPI_ACC_DOCUMENT_POST " . Is this is a correct approach?
After this correction when we try to post clearing document using BAPI, getting error :- "FI interface: Small difference * USD 30 cannot be distributed".
We are passing parameters :-
Document Header :- 
OBJ_TYPE ( Passing manually created entry of TTYP)
BUS_ACT( RFBU)
DOC_TYPE(YD)
Other entries which I am passing are  OBJ_KEY, OBJ_SYS, USERNAME, COMP_CODE, DOC_DATE, POSTNG_DATE, FISC_YEAR, PERIOD.
ACCOUNTGL:-
Item No:-1
GL Account
ITEM_TEXT
AC_DOC_NO(AR Invoice of payment document which I want to clear) for e.g. 7100000001
Customer
Item No:-2
GL Account
ITEM_TEXT
AC_DOC_NO(AR Invoice of payment document which I want to clear) for e.g. 7100000002
Customer
ACCOUNTRECEIVABLE:-
Item No.:-3
Customer( same which i have passed in GL account parameter)
comp_code:- Header company code
CURRENCYAMMOUNT:-
item No:-1
CURR_TYPE: 10 (company code curr)
Currency (from document)
AMT_DOCCUR (amount of AR invoice of account GL item no 1).
item No:-2
CURR_TYPE: 10 (company code curr)
Currency (from document)
AMT_DOCCUR (amount of AR invoice of account GL item no 2)
item No:-3
CURR_TYPE: 10 (company code curr)
Currency (from document)
AMT_DOCCUR (Sum of above two AR invoice which will be against customer)
Do you have any solution for this error? kindly suggest.

Answer 1

Check if account for payment differents defined ?
IMG: Financial Accounting -> Accounts Receivable and Accounts Payable -> Business Transactions -> Incoming Payments Global Settings -> Overpayment/Underpayment -> Define Reason Codes / Define Accounts for Payment Differences.