CREMAS Update during inbound processing

Question

Hi everybody,
I receive vendor information from a external system.
I want to import them by idoc type CREMAS05.
Everthing works fine.
But I have the problem that sometimes the external system sents a vendor number which is outside the allowed number range.
Therefore I want to implement a check. If this check is wron, I set a error status and message and the inbound will be canceld.
I have implemented Enhancement VSV00001 and User Exit EXIT_SAPLKD02_001 (Inbound: Read and process vendor segments)
the Problem is, that this user exit will be only called if the idoc includes a filled customer segment.
But in my case it didn't.
I had the idear to change the flag outside where are responsible for calling the user exit in that way, that evertime the exit will be called.
But there is no enhancement point there and I don't want to modify the SAP standard source.
How can I handle this?
Regards
Christian

Answer 1

If you have duplicate Vendor number, it should not be able to reach to the point where it calls the subroutine call_transaction.
If you have implemented the implicit point at subroutine FILL_CRE_DATA_WITH_E1LFA1C, your code should be similar to this:
" do the validation of Vendor #
        v_workflow_result = 99999.   "<< this makes it to exit out and stops processing
        CLEAR t_idoc_status.
        t_idoc_status-docnum = f_idoc_control-docnum.
        t_idoc_status-status = c_idoc_stat_input_error.
        t_idoc_status-msgty = sy-msgty.
        t_idoc_status-msgid = sy-msgid.
        t_idoc_status-msgno = sy-msgno.
        t_idoc_status-msgv1 = sy-msgv1.
        t_idoc_status-msgv2 = sy-msgv2.
        t_idoc_status-msgv3 = sy-msgv3.
        t_idoc_status-msgv4 = sy-msgv4.
        t_idoc_status-segnum = segnum.
        t_idoc_status-segfld = 'LIFNR'.     "<<
        t_idoc_status-uname = sy-uname.
        t_idoc_status-repid = sy-repid.
        APPEND t_idoc_status.
        t_return_variables-doc_number = f_idoc_control-docnum.
        t_return_variables-wf_param = c_retv_error_idocs.
        APPEND t_return_variables.
Regards,
Naimesh Patel