Field help (PROPLN) 

A workbench is uniquely identified with the help of a reference composed of a maximum of 20 alphanumerical characters.
The management of this reference depends on the value of parameter PPLAUTNUM - Production workbenchnumbering of chapter AAS - Assets.

The reference assigned to the workbench depends on the setup of the sequence number counter assigned to the Production workbench reference field in the Asset module. (Sequence number counter Structure and Sequence number counter assignment functions).