Did BSP limit function call?

We have create a simple BSP application, there we call a function 'LANGUAGE_CODE_SAP_TO_ISO' first in a page. But if we call another function 'READ_TEXT' continuly, the later one never work anymore! Whatz up with our BSP?

Our code in BSP application:

• event handler for data retrieval

tt_banfn = '0010000022'.

SELECT * FROM eban

INTO CORRESPONDING FIELDS OF TABLE

tt_eban

WHERE banfn = tt_banfn.

SELECT banfn badat bsart afnam FROM eban

INTO (tt_banfn, tt_badat, tt_bsart, tt_afnam)

WHERE banfn = tt_banfn.

ENDSELECT.

DATA t_name(15) TYPE c.

DATA: zebantab1 TYPE zebantab1,

zebantab TYPE zebantab.

*DATA: tline like tline.

TYPES: BEGIN OF tt_line,

tdformat TYPE tdformat,

tdline TYPE tdline,

END OF tt_line.

DATA itab1 TYPE STANDARD TABLE OF tt_line

INITIAL SIZE 0.

DATA itab2 TYPE STANDARD TABLE OF tt_line

INITIAL SIZE 0.

LOOP AT tt_eban INTO zebantab.

CONCATENATE tt_banfn zebantab-bnfpo INTO t_name.

DATA: iso type LAISO.

CALL FUNCTION 'LANGUAGE_CODE_SAP_TO_ISO'

EXPORTING SAP_CODE = sy-langu

IMPORTING ISO_CODE = iso

EXCEPTIONS OTHERS = 1.

IF sy-subrc IS INITIAL and ( iso eq 'EN' or iso eq

'DE' ).

endif.

*TTXOB TTXID

CALL FUNCTION 'READ_TEXT'

EXPORTING

• CLIENT = SY-MANDT

id = 'B01'

language = 'ZF'

name = t_name

object = 'EBAN'

• ARCHIVE_HANDLE = 0

• LOCAL_CAT = ' '

• IMPORTING

• HEADER = itab3

tables

lines = itab1

EXCEPTIONS

ID = 1

LANGUAGE = 2

NAME = 3

NOT_FOUND = 4

OBJECT = 5

REFERENCE_CHECK = 6

WRONG_ACCESS_TO_ARCHIVE = 7

OTHERS = 8

.

IF sy-subrc <> 0.

• MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO

• WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.

ENDIF.

MODIFY tt_eban FROM zebantab.

ENDLOOP.