How to read data in enhancement routine

Hi;
I am tring to read global data in a scope of  enhancement routine.
I tried to use the folowing code:
DATA:
   lv_struct_pointer_str   TYPE string.
  FIELD-SYMBOLS:
    <fs_curr_struct>    TYPE ANY.
        lv_struct_pointer_str = '(SAPLMEGUI)MEPO1311'.
          ASSIGN (lv_struct_pointer_str) TO <fs_curr_struct>.
          IF <fs_curr_struct> IS ASSIGNED.
            ls_MEPO1311 = <fs_curr_struct> .
         endif.
However the code doesn't work well, and the structure is not assigned.
Whats wrong with this code?
Is  another way to read the global data?
Regards
Moshe

stay in debug mode(advanced) inside the enhancement area.. (at some line..) and see what global fields are available at tha time. check if you are using the currect one or not.

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