Unicode Program in Unicode Environment

This person said it deeply :D
"Unchecking the unicode is a bad idea. Unchecking the unicode on a unicode system is a worst idea."
The code that I tried to copy wrote:
DO 20 TIMES
VARYING wa_0008 FROM p0008-lga01 NEXT p0008-lga02.
Because of the unicode check, the error came: "P0008-LGA01" and "WA_0008" are type-incompatible.
Then the solution:
DO 20 TIMES
VARYING wa_0008-lga FROM p0008-lga01 NEXT p0008-lga02
VARYING wa_0008-bet FROM p0008-bet01 NEXT p0008-bet02.

:)