Can not refer to a field in the structure INCLUDE

Question

Hi gurus,
I have tried to declare an internal table like ( SAP standard )
DATA: BEGIN OF OBJECT_TAB OCCURS 0.
        INCLUDE STRUCTURE RQMQMEL1.
DATA:   SELECTED,
        PM_SELECTED TYPE PM_SELECTED,
        LIGHTS,
"add some more fields
      END OF OBJECT_TAB.
But then i can not reference to this structure for the field QMNUM in the INCLUDE STRUCTURE RQMQMEL1.
I refer by l_qmnum = object_tab-qmnum . It show an error message like " This field can not be found in this table"
Could you suggest me a solution for this
Thanks

Answer 1

Hi,
Sorry for the wrong suggestion.  Please check the help of Include. It specifies as follows:
Even if the structure rec that you want to define contains extra components, do not use
DATA: BEGIN OF rec,
        INCLUDE STRUCTURE s.
DATA:   ...
      END OF rec.
Instead, use
DATA: BEGIN OF rec,
        rec LIKE s,
      END OF rec.
You can then address s as a substructure of rec.
Note
Although "INCLUDE STRUCTURE s." expands the substructure s into its components, its alignment remains unchanged. This means that there may be extra fields inserted as padding before the first component or after the last component of s within rec.