Internal table field name problem

Dear All,

I am declaring one internal table & fetching data using inner join. Following is my structure of internal table but it is not fetching data into MATNR1, the data is there in the table.

Kindly suggest why this is happening?

Regards,

Dilip Gupchup

internal table

data : begin of sales_to_purchase_link_itab occurs 10,

*******FOR P O RELATED INFORMATION

EBELN LIKE EKKN-EBELN,"DOCUMENT NO

AEDAT LIKE EKPO-AEDAT,"P O DATE

EBELP LIKE EKKN-EBELP," ITEM

MATNR LIKE EKPO-MATNR,"MATERIAL

MENGE LIKE EKKN-MENGE,"QUANTITY

SAKTO LIKE EKKN-SAKTO,"G/L Account Number

NETWR LIKE EKKN-NETWR,"Net order value in PO

*******END FOR P O RELATED INFORMATION

*******FOR SALES ORDER RELATED INFORMATION

VBELN LIKE EKKN-VBELN,"SALES DOC NO

VBELP LIKE EKKN-VBELP,"SALES DOC ITEM

MATNR1 LIKE VBAP-MATNR,"SALES MATERIAL

ERDAT LIKE VBAP-ERDAT,"SALES DOC DATE

ARKTX LIKE VBAP-ARKTX,"MATERIAL DESCRIPTION

ZMENG LIKE VBAP-ZMENG,"QUANTITY

NETPR LIKE VBAP-NETPR,"SALE VALUE

*******FOR SALES ORDER RELATED INFORMATION

end of sales_to_purchase_link_itab.

select query

select

ekkn~ebeln

EKKN~EBELP

EKKN~SAKTO

EKKO~AEDAT

ekko~bukrs

EKPO~MATNR

EKPO~MENGE

EKPO~NETWR

vbap~vbeln

ekkn~vbelp

vbap~arktx

VBAP~MATNR

into corresponding fields of table

sales_to_purchase_link_itab from ekkn

inner join ekko on ekkn_{ebeln eq ekko}ebeln "UP TO 10 ROWS.

INNER JOIN EKPO ON EKKO_{EBELN EQ EKPO}EBELN

inner join vbap on ekkn_{vbeln eq vbap}vbeln

WHERE

EKPO~AEDAT IN S_ERDAT1.