Dear 
I could then solve the "Internal error: DYNSQL_GENERATE_WHERE_CLAUSE(4)" according to the link found by me as above. Regarding your above advised info. -
- "archiving is only done for closed business cases, 1 order = 1 business case.". Then, if the open orders or any open order items are "Deleted" without proceeded, is it required to archieve such kind of orders so as to be able to archieve the Material ?
Just have this uncertain question (related to my Q1 at the beginning) and wish to be able to directly get the answer from you.
In fact, the discussion forum is used to share knowledge & experience from your experts instead of asking the questioner to walk across a big circle and then search / observe the solution. It can be feasible if time is available.
Thanks for your general advice and info. anyway.
Regards,