Did you ever wonder why in the syslog (transaction SM21) some entries with the message “UNBUFFERED RV_BELEG” are shown:
The creation of this log had been introduced with note 1711468. The background had been to have a clue for investigation, when errors due to wrong modifications in number range user-exits (see note 1176705) occur.
Now in function module NUMBER_GET_NEXT an entry for the system log is prepared, in case a buffered number range is used, and the buffer is deactivated:
The other pre-reqisite for creation of the log is the definition of parameter no_syslog, which is in standard coding ‘space’, if you have not modified include LSNR3TOP:
Therefore if the number range object RV_BELEG is buffered, and in user-exit USEREXIT_NUMBER_RANGE of Include RV60AFZZ there is some logic present, to deactivate the buffering in specific cases (as described in note 363901) with a line:
no_buffer = ‘X’.
then in the syslog mentioned entry “UNBUFFERED RV_BELEG” is created.
It could be that this is not intended, and the logging is not useful. In this case you should implement note 1913844.
Knowledge Base Articles with general information on buffering in invoice creation: