Calling "BAPI_INCOMINGINVOICE_CREATE" multiple times causes short dump. First calling is successfull, not the others.You receive a short dump /BOBF/CX_FRW_FATAL if several invoices are created. Implement the SAP Note 2452239. You will get rid of clear problem of attribute "mv_transaction_state" of class "/BOBF/CL_TRA_TRANSACTION_MGR"

Step by step explanation of how to add a new tab to BP screen. Add new fields to standard structure incl_eew_kna1. incl_eew_kna1 is included in KNA1. Fields will be in KNA1 automatically.              Add same fields to incl_eew_kna1_x. Make sure that data element must be char1 for ex. bapiupdate.  Create a Z function group. IN top include define varibles:            TABLES: kna1. constants: table_nam

With ABAP on HANA we can define variables/internal tables/structures/field symbols easily and quickly. Lets see some examples of data declarations. Here is a simple data declaration for a variable. SELECT SINGLE ebeln FROM ekpo INTO @DATA(lv_ebeln) WHERE banfn = ’100000’ AND loekz = @space. An internal table/structure definiton. Select matnr, spras, maktx into table @data(lt_makt) from makt where matnr in @lr_matnr. Loop at lt_makt into data(ls_makt). .. End

WS_REVERSE_GOODS_ISSUE function module is used to reverse goods issue. Here is an example of function module. lv_tcode = 'VL09'. lv_vbtyp = 'J'. CALL FUNCTION 'WS_REVERSE_GOODS_ISSUE' EXPORTING i_vbeln = p_vbeln i_budat = p_budat i_tcode = lv_tcode i_vbtyp = lv_vbtyp TABLES t_mesg = lt_mesg T_VBAPF

To update custom fields on mara with BAPI_MATERIAL_MAINTAINDATA_RT, EXIT_SAPL1001_003 must be activated  and custom fields must be mapped in user exit but writing code in user exit is not enough. Also a customization is neeeded. Go to t-code SPRO press F5. Logistic general-material master-field selection and click to assign fields to field selection groups. add your custom fields here and assign a number for them. Check note 568513 for details. Try to update fields again and enjoy the