Can not converted to be a charter-type field

Question

Hi everyone,
  As i m new in abap . i wrote this code and received charter type error.
*& Report  ZT11
REPORT  ZT11.
DATA: aa type lfa1.
     tables lfa1.
     select * from lfa1 into aa where lifnr > 'Z' .
         write / aa.
        endselect.
    if sy-subrc <> 0.
         write / 'No records found'.
        endif.
error is
'AA' can not converted to a character-type field.
plz help to reslove the error .
thanks in advance.
Edited by: Faisal Abbasi on May 9, 2010 11:19 AM

Answer 1

Hi Dear,
This is Unicode problem, In unicode systme some restriction in programing.
There is three kid of data type
Character Processing ( C, N, D, T and STRING ).
Byte Processing Mode ( X and XString ).
Numeric Data Type ( I, P , F ).
whenever in structure all kind of data types are used then you can not use WRITE and then whole structure name.
in LFA1 in ECC6.0 if any custom fields are not added then up to length 1232 is determined as Character.
so if you will give aa(1232) it will work similarlly other kid of remainig data tpe you move in another structure of required format and then check.
REPORT ZT11.
DATA: aa type lfa1.
tables lfa1.
select * from lfa1 into aa where lifnr > 'Z' .
write / aa(1232).
endselect.
if sy-subrc 0.
write / 'No records found'.
endif.
For better Understanding Check
The following structure has both character-type and non-character-type components:
BEGIN OF STRUC,
  a TYPE c LENGTH 3,    "Length 3 characters
  b TYPE n LENGTH 4,    "Length 4 characters
  c TYPE d,             "Length 8 characters
  d TYPE t,             "Length 6 characters
  e TYPE f,             "Length 8 bytes
  f TYPE c LENGTH 28,   "Length28 characters
  g TYPE x LENGTH 2,    "Length 2 bytes
END OF STRUC.
The Unicode fragment view splits the structure into four areas F1 - F5.
[ aaa | bbbb | cccccccc | ddd | AAA | eeee | fffffffffffff | gg ]
[            F1               |  F2 |  F3  |       F4      | F5 ]
Offset/length access is only possible for the character-type initial fragment F1. Specifications such as struc(21) or struc7(14) are accepted and are handled as a single field of type c. An access such as struc57(2), for example, is not permitted in Unicode systems.