Problem with BTE and FI-parking- no data from memory ID to ABAP

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Hi Experts,

I have a scenario in Business Workflow where I want to catch the data(BKPF & BSEG) after SAP transaction processing - event is to change parked FI-document with FBV2. I´m trying to use BTE to receive the data after processing transaction.

All BTE steps seems to be activated - because I can debug my functions when processing FBV2 - but I cannot reach any data into my coding after processing.

I have created my project in BF24:

ZXXX Testing: WF-memory ID

I have also linked few FI-events to my BTE interface funtion in BF34:

00001130 ZXXX ZXXX_FIPP_CHANGE_BTE
00002213 ZXXX ZXXX_FIPP_CHANGE_BTE
00002217 ZXXX ZXXX_FIPP_CHANGE_BTE

My BTE function ZXXX_FIPP_CHANGE_BTE is as following:

DATA: memid(15) VALUE 'ZXXX_2217'.

*Initialize
CLEAR: t_vbkpf,
t_vbsegs.
FREE MEMORY ID 'ZXXX_2217'.
*Backtracking of BTE
EXPORT t_vbkpf
t_vbsegs
TO MEMORY ID memid.

ENDFUNCTION.

I have also created funtion to call FBV2:

data: memid(15) value 'ZXXX_2217'.
CALL TRANSACTION 'FBV2'.

*Import memory of BTE
IMPORT t_vbkpf
t_vbsegs
FROM MEMORY ID memid.
*Free memory id
FREE MEMORY ID memid.

When I set a breakpoint to both of the functions and I execute FBV2 I reach the breakpoints. Problem is that the data is not passed from memid 'ZXXX_2217' into function after FBV2(this syntax: IMPORT t_vbkpf t_vbsegs FROM MEMORY ID memid.)

What could be missing. So both functions are called but NO DATA is passed from memory ID to my internal tables? This seems to be a problem with memory ID´s. Also in my BTE function ZXXX_FIPP_CHANGE_BTE I receive a sy-subrc value 4 when executing syntax "FREE MEMORY ID 'ZXXX_2217'. ".

All hints appreciated,

Jani