Calling ABAP from SAPScript

Hi ,
I am facing some problem in calling a subroutine from Standard Text element (Txn SO10).
I have done the following in a text element.
/: DEFINE &GD_PREV_NAME& = ''
/: PERFORM GET_PREV_NAME IN PROGRAM ZTEST
/: USING &P0001-PERNR&
/: USING &P0002-BEGDA&
/: CHANGING &GD_PREV_NAME&
/: ENDPERFORM
In the ABAP ZTEST,
FORM get_prev_name TABLES tabin STRUCTURE itcsy
tabout STRUCTURE itcsy.
DATA : ld_pernr LIKE pa0001-pernr.
READ TABLE tabin WITH KEY name = 'P0001-PERNR'.
IF sy-subrc = 0.
ld_pernr = tabin-value.
ENDIF.
ENDFORM.
I found in debugging that the both tables TABIN & TABOUT are empty in the FORM get_prev_name !!!!
Can anyone hint on why the values are not passed to ABAP ??
Many thanks in advance.
Regards,
Sandip.
Ph : +44 121 683 2814.

Hi Sandip,
I guess the problem here might be that the values aren't getting flown.
First try this (hardcoding and testing),
/: DEFINE &GD_PREV_NAME& = ''
/: PERFORM GET_PREV_NAME IN PROGRAM ZTEST
/: USING '1000'
/: USING '20050101'
/: CHANGING &GD_PREV_NAME&
/: ENDPERFORM
if it works fine, then figure out whether the variables P0001-PERNR AND P0002-BEGDA are not null when passed. If not then try this
/: DEFINE &GD_PREV_NAME& = ''
/: PERFORM GET_PREV_NAME IN PROGRAM ZTEST
/: USING &P0000-PERNR&
/: USING &P0002-BEGDA&
/: CHANGING &GD_PREV_NAME&
/: ENDPERFORM
ELSE TRY PA0000-PERNR AND PA0002-BEGDA
Cheers,
Sam.

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any program, subject to the normal ABAP runtime
authorization
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resolve include
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