CSAP_MAT_BOM_CREATE problem via RFC because of 'strg-reset_sign'

Question

Hi!
I have the following problem:
I want to create a bom in SAP via RFC using the function CSAP_MAT_BOM_CREATE. The function fails if a component of the bom starts with 'X'!
I have debugged the function CSAP_MAT_BOM_CREATE and found that there is a flag strg-reset_sign which contains an 'X' and every value of each component which starts with the same value ('X') is deleted. So all values (for example IDNRK) starting with 'X' are cleared and so I get the message "data incomplete..."
The code doing this is:
hlp_tabfld1 = <tabfld1>.
check not <tabfld1> is initial.
if strg-reset_sign is initial or
hlp_tabfld1 ne strg-reset_sign.
THIS CODE INSIDE THE IF IS NOT EXECUTED IF hlp_tabfld1 CONTAINS AN 'X'. hlp_tabfld1 CONTAINS THE FIRST VALUE OF EACH FIELD OF A BOM-COMPONENT IN A LOOP.
The flag 'strg-reset_sign' is not set to 'X' when I try it inside the SAPGui with SE37!
Is this a customizing issue or where does the flag come from???
Thanks,
Konrad

Answer 1

Thanks for reply,
i have debug my program and found that run time error is coming at GET_MAST function module.
but  i have already checked that     MATNR and STLNR  is already filled before reaching to that FM.
GET_MAST
IF NOT SET IS INITIAL.
      IF     WA-MATNR IS INITIAL
         AND WA-STLNR IS INITIAL.
         RAISE KEY_INCOMPLETE.
      ENDIF.
      IF     WA-MATNR <> SPACE
         AND WA-STLNR <> SPACE.
         RAISE KEY_INVALID.
      ENDIF.
please can any one provide me the solution for that.
Regards
Pavneet Rana