CSAP_BOM_ITEM_MAINTAIN Says ok but updates nothing. Code inside...

Question

Can anyone tell me why this isn't working?
Here is the simplified scenario:
I have a BOM for material number 123456. The BOM has one component called component1. I want to update that component to component2.
When I run what you see below, it opens fine (ran debugger and it returned all info on the BOM as expected).
It runs supposedly with no issue.
When I look at the log, it in fact says BOM for Material 123456 Changed. But when I go back into CS03 to look at the BOM, it shows no changes. Still has Component1 instead of Component2. I can tell you that in reality there are about 6 items in the BOM to begin with and I run this FM to delete all of the first 5 items so there is just one left. It is this last (and now only) item that I am trying to change. The delete of the first 5 items works without any issues. I then close it and again open the BOM and try to modify the remaining item to have component2. (I tried updating the component on the first pass and it didn't work so I thought I would simplify it and only have one item to deal wtih).
Here is the code. Does anyone see anything obvious as to why it is not working?
*---- Field string BOM header data
data: begin of tstk2.
          include structure stko_api02.
data: end of tstk2.
*---- Table BOM items
data: begin of tstp2 occurs 0.
          include structure stpo_api02.
data: end of tstp2.
*---- Tables for dependencies:
*     basic Information
data: begin of tdep2_data occurs 0.
         include structure dep_data.
data: end of tdep2_data.
*     Description
data: begin of tdep2_descr occurs 0.
         include structure dep_descr.
data: end of tdep2_descr.
*     Source
data: begin of tdep2_source occurs 0.
         include structure dep_source.
data: end of tdep2_source.
*     Order
data: begin of tdep2_order occurs 0.
         include structure dep_order.
data: end of tdep2_order.
*     Documentation
data: begin of tdep2_doc occurs 0.
         include structure dep_doc.
data: end of tdep2_doc.
data: flg_warning like capiflag-flwarning.
DATA: CONV_EXIT(10).
*- Database log open
   call function 'CALO_INIT_API'
        exceptions
             log_object_not_found     = 1
             log_sub_object_not_found = 2
             other_error              = 3
             others                   = 4.
*- Open the BOM for changes
   call function 'CSAP_MAT_BOM_OPEN'
        exporting
             material = '000000000000123456'
             plant = '1001'
             bom_usage = '3'
             valid_from = '07/08/2014'
        importing
             o_stko     = tstk2
             fl_warning = flg_warning
        tables
             t_stpo     = tstp2
        exceptions
             error      = 1.
                  LOOP at tstp2. "Go through the list of items for this BOM and set the values
                  tstp2-component = 'COMPONENT2'.
                  tstp2-comp_unit = 'PC'.
                  "MODIFY TSTP2. "tried this with the modify and without both return same result of nothing updated
                  perform item_maintain.
        call function 'CSAP_MAT_BOM_CLOSE'
        exporting
              fl_commit_and_wait = 'X'
         importing
              fl_warning = flg_warning
         exceptions
              error   = 1.
   Form item_maintain.
      call function 'CSAP_BOM_ITEM_MAINTAIN'
           exporting
                i_stpo       = tstp2
           importing
                fl_warning   = flg_warning
*            tables
*                t_dep_data   =
*                t_dep_descr  =
*                t_dep_order  =
*                 t_dep_source = tdep2_source
*                t_dep_doc    =
            exceptions
                error        = 1
                others       = 2.
   ENDFORM.
--------------END OF CODE---------------
All looks good other than the fact that nothing gets changed in the BOM. Looking for ideas here.
Thx

Answer 1

Hi Richard,
You can try using:
    CALL FUNCTION 'CSAP_MAT_BOM_CLOSE'
      EXPORTING
        fl_commit_and_wait = ''
      EXCEPTIONS
        error              = 1
        OTHERS       = 2.
and FM BAPI_TRANSACTION_COMMIT:
CALL FUNCTION 'BAPI_TRANSACTION_COMMIT'
     EXPORTING
       wait          = 'X'
*   IMPORTING
*       RETURN        = .
I hope you help.