Table is not Unicode Convertible

Question

hello,
i am getting error the type of tha database table or work area or internal table are not unicode convertible. please help me.
REPORT ZEXCISE_INVOICE_RTNS
LINE-COUNT 100
MESSAGE-ID 8I.
*INCLUDES
INCLUDE RVADTABL.
*TABLES
TABLES : T001, "Company Codes
T005, "Countries
LFA1, "Vendor Master (General Section)
EKKO, "Purchasing Document Header
EKPO, "Purchasing Document Item
MKPF. "Header: Material Document
*Excise Tables
TABLES : J_1IEXCHDR, "Excise invoice header detail
J_1IEXCDTL, "Excise invoice line item details
J_1IEXCDEF, "Tax default informations
J_1IMOVEND. "Vendor Master Excise Additional Data
*INTERNAL TABLES AND STRUCTURES
DATA : BEGIN OF TJ_1IEXCDTL OCCURS 0.
INCLUDE STRUCTURE ZJ1IEXCDTL.
DATA : END OF TJ_1IEXCDTL.
DATA : i_mseg like mseg occurs 0 with header line.
DATA : TJ_1IEXCDTL_Temp like TJ_1IEXCDTL occurs 0 with header line.
DATA : begin of it_ekpo occurs 0,
ebeln like ekko-ebeln, "PO Number
ebelp like ekpo-ebelp, "Line item number
meins like ekpo-meins, "Unit of measurement
mwskz like ekpo-mwskz, "Tax on Sales/Purchases Code
netpr like ekpo-netpr, "unit price
end of it_ekpo.
DATA : begin of it_a003 occurs 0,
knumh like a003-knumh, "Condition record number
kappl like a003-kappl, "Application
kschl like a003-kschl, "Condition type
mwskz like a003-mwskz, "Tax on Sales/Purchases Code
end of it_a003.
DATA : begin of it_konp occurs 0,
knumh like konp-knumh, "Condition record number
kappl like konp-kappl, "Application
kschl like konp-kschl, "Condition type
mwsk1 like konp-mwsk1, "Tax on Sales/Purchases Code
kbetr like konp-kbetr, "Rate/unit
end of it_konp.
DATA : begin of it_konv occurs 0,
knumv like konv-knumv, "Number of the document condition
kposn like konv-kposn, "Condition item number
kschl like konv-kschl, "Condition type
krech like konv-krech, "Calculation type for condition
kbetr like konv-kbetr, "Rate (condition amount or percentage)
kwert like konv-kwert, "Condition value
end of it_konv.
*VARIABLES
DATA: RETCODE LIKE SY-SUBRC. "Returncode
DATA: REPEAT(1) TYPE C.
DATA: XSCREEN(1) TYPE C. "Output on printer or screen
DATA: G_FM_NAME TYPE RS38L_FNAM,
V_SUBTOTAL LIKE J_1IEXCDTL-EXBAS.
DATA : V_CHID(45) TYPE C,
V_DESC1(30) TYPE C,
V_DESC2(30) TYPE C,
V_DESC3(30) TYPE C.
DATA : v_document(15) TYPE C.
SELECTION SCREEN
SELECTION-SCREEN : BEGIN OF BLOCK b1 WITH FRAME TITLE text-001.
PARAMETERS: p_mblnr like mkpf-mblnr OBLIGATORY,
P_time like SY-UZEIT.
SELECTION-SCREEN END OF BLOCK b1.
START-OF-SELECTION
start-of-selection.
PERFORM GET_DATA.
CHECK RETCODE = 0.
Get the form name
PERFORM GET_FORM_NAME.
Call the form
PERFORM CALL_FORM.
End-Of-Selection
end-of-selection.
*FORM GET DATA
FORM GET_DATA.
SELECT single * from mkpf where mblnr = P_MBLNR.
IF sy-subrc <> 0.
RETCODE = 4.
message i078(8I).
exit.
ELSE.
PERFORM GET_EXCISE_INVOICE.
if retcode <> 0.
MESSAGE i301(8I).
else.
PERFORM GET_EXCISE_DETAILS.
endif.
ENDIF.
ENDFORM. "GET_DATA
*FORM GET EXCISE DETAILS
FORM GET_EXCISE_DETAILS.
DATA: KAWRT LIKE KOMV-KAWRT. "Excise Duty - Base Amount
SELECT * FROM J_1IEXCDTL INTO TABLE TJ_1IEXCDTL
WHERE TRNTYP = J_1IEXCHDR-TRNTYP
AND DOCYR = J_1IEXCHDR-DOCYR
AND DOCNO = J_1IEXCHDR-DOCNO.

Answer 1

The structures do NOT have to be the same for a CORRESPONDING FIELDS. This works in a test program I have:
==================
DATA: itab TYPE STANDARD TABLE OF istruct.
SELECT *
FROM ztab
INTO CORRESPONDING FIELDS OF TABLE itab
WHERE vkorg = 'XYZ'
AND zyear = '2007'
AND werks = '00A'.
===================
where "istruct" is the same as the DB table definition plus two additional columns and minus MANDT.
However, in another program I get the "not Unicode compatible" error when I try to activate it.
Why does it work in one case and not the other? Is it some program setting?