The ADG for materials and supplier were really well maintained.
I decided, to test erasing directly the line in the configuration of account determination, and then completing again a new one with exactly the same ADG and accounts.
And after that... surprisingly the inbound delivery is posted! and the previous error test documents automatically have been posted too.
It's strange the behavior of the system, buy it's a new tenant and something wrong should have been occured in this account determination.
Thanks for your help!
Best regards