BAPI_ALM_NOTIF_TASK_COMPLETE does not set carried-data

Hi,

I am using BAPI_ALM_NOTIF_DATA_ADD to add a task to an existing notification. Because I have to set carried_out_by, carried_out_date and carried_out_time (and this FM only can set carried_by), I also use this call:

CALL FUNCTION 'BAPI_ALM_NOTIF_TASK_COMPLETE'

EXPORTING

number = notif_no

task_key = task_key

carried_out_by = sy-uname

carried_out_date = sy-datum

carried_out_time = sy-uzeit

TABLES

return = return.

Unfortunately, the carried_out-data is not set (but the status is changed correctly to 'completed'). Table return is empty.

What am I doing wrong???