Field help (POCLINACC) 

These fields indicate the purchase accounting accounts. The charts of accounts that can be accessed depend on the account core model associated to the company of the movement. If these fields are not entered the account will be automatically determined by the accounting code for the product as a function of the setups for the PORD automatic journal.
SEEINFOThe presence of this field depends on the entry transaction used.
If the field is not assigned the account will be determined automatically (upon invoice posting) by the accounting code of the product according to the setup of the PIHI automatic journal.