Field help (PTHINVDTA) 

This is the number of the invoicing element identifying the associated amount (charges, freight, packaging, discount, etc.).
The list of invoicing elements is made up of the invoicing elements from the selected orders and the elements from the order and invoicing supplier according to the origin defined in the invoicing element itself.
The elements coming only from the order or invoicing supplier record do not inherit the same value as the supplier even for a direct receipt.
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