Dear Experts,
Let me close this discussion by saying as below.
Our company decided to complain directly to SAP
Due to nothing updated about what the root cause is
& their poor solution 'ZVINVOIC' which is just useless to us
(Just shows all multiple invoices in the table 'VBFA' even it's I/C billing...)
In parallel, we decied to develop report program
which will check all pending data on DB-update Queue without any support from SAP.
And the program will be used at every system-down time(Executed by our BC guy)
I hope you'll never face this kind of issue on SAP,
But if you also get this kind of issue unfortunately,
I recommand you not to contact SAP via support-incident.
It was just time-wasting to me. So, please save your time to make your own solution....
B/R
Jihoon Jung