Define the structure CI_FKKEXC_CL with the required fields as follows, for example.

Component Component Category

MANDT MANDT

OFFIC OFFIC_KK

CHDSK CHDSK_KK

… …

.INCLUDE CI_FKKEXC_CL

MYFIELD

Add your entry/entries in the Implementation Guide for Contract Accounts Receivable and Payable under  Basic Functions Open Item Management Define Selection Categories . The field names must match the field names in structure CI_FKKEXC_CL and you must set the External Selection Criterion indicator for each field that you enter. In our example, add the following entry in Customizing:

Application area R Selection category 1 Meaning Invoice Field name MYFIELD

Define event 6210. That is, in this event, convert the external selection criteria into internal selection criteria. You can do this as follows, for example:

FUNCTION Z_FKK_SAMPLE_0210.

*"----------------------------------------------------------------------

*"*"Local interface:

*"   IMPORTING

*"      VALUE(I_SELTAB) LIKE   ISELTAB STRUCTURE   ISELTAB

*"   TABLES

*"      T_SELTAB STRUCTURE   ISELTAB

*"   EXCEPTIONS

*"       UNKNOWN_SELECTION

*"----------------------------------------------------------------------

IF i_seltab-selfn = 'MYFIELD'.

 IF i_seltab-selcu = '0123456789'.

        t_Seltab-selnr = '0001'.

        t_seltab-selfn = 'OPBEL'.

        t_seltab-selcu = '000000004711'.

        APPEND t_seltab.

     ENDIF.

ENDIF.

ENDFUNCTION.