I have to type again the account number creating a PO

Hi,

using the user fields personnalisation, I'm able to put the account number in the lines during PO creation. The account number is selected by a user table. The account number is existing in the chart of accounts.

When I want to add the PO, the process is stopped, I must type manually the account number (but the same !) in order to finally create the PO.

Any idea ?