DUMP GETWA_NOT_ASSIGNED by ASSIGN FS dynamically

Question

I got a DUMP  GETWA_NOT_ASSIGNED, which is triggered by the ASSIGN statement. I once raised this problem. The code is as:
data: name3(21) value '(SAPLMBWL)IMSEG-ABLAD'.
assign (name3) to <f>.
here, IMSEG seems to be a interface of some FM. At last time, I was suggested to transfer the name3 to upper case. It works. But in some condition, it will also raise a DUMP. So I am thinking about there should be some other problem.
In the DUMP text, I found this in ERROR analysis:
You address a global function interface, although the
respective function module is not active - that is, is
not in the list of active calls. The list of active calls
can be taken from this short dump.
I checked the loaded program in debug mode, the program SAPLMBWL is not in the loaded list. But the program can run 2 times for the ASSIGN statement, At the first time, it works fine without any problem. But at the 2nd time, it raise the DUMP.
I think it has sth to do with the memory or objects in runtime. Is there any way to check (SAPLMBWL)IMSEG-ABLAD before the ASSIGN statement?
How to check the active calls list mentioned in the ERROR analysis and what can be done for it? Any check?
thanks for help.

Answer 1

I had a similar problem and the SYSTEM_CALLSTACK fm seems to work perfectly.  The "TRY ... CATCH ... ENDTRY or CATCH SYSTEM-EXCEPTIONS " option dosen't seem to work because GETWA_NOT_ASSIGNED doesn't seem to be a catchable runtime error.
Here is the code:
    IF komk-vbtyp = 'M'.
      IF ( preisfindungsart = 'A' OR preisfindungsart = 'C' ) AND (
         komk-kappl EQ 'V').
        CALL FUNCTION 'SYSTEM_CALLSTACK'
         IMPORTING
           CALLSTACK          = lt_callstack
           ET_CALLSTACK       = lt_sys_callstack.
        loop at lt_callstack assigning <ls_sys_callstack>
                             where MAINPROGRAM = 'SAPLV60A'
                               and BLOCKTYPE   = 'FUNCTION'.
          "See if this function calls the XVBFS global parameter and field-symbol
          select single * from FUPARAREF into ls_FUPARAREF
                                         where FUNCNAME  = <ls_sys_callstack>-BLOCKNAME
                                           and R3STATE   = 'A'      "Active
                                           and PARAMETER = 'XVBFS'  "Global parameter / field symbol
                                           and PARAMTYPE = 'T'.     "Table
          if sy-subrc = 0.
            lv_can_add_to_log = abap_true.
            exit.
          endif.
        endloop.
        if lv_can_add_to_log = abap_true.
          PERFORM vbfs_hinzufuegen_allg(saplv60a) USING
                komk-belnr komp-kposn 'ZVSD' 'E' '002'
                lo_rfc_result-tran_id sy-datum sy-uzeit space .
          komp-prsok = space.
        ELSE.
          MESSAGE ID 'ZVSD' TYPE 'E' NUMBER '002' WITH
          lo_rfc_result-tran_id  sy-datum sy-uzeit.
        endif.
      endif.
    endif.
Edited by: Jake Taber on Apr 24, 2011 4:34 AM
Edited by: Jake Taber on Apr 24, 2011 4:35 AM