Transfer of Z-fields from VBRP table to COPA

Hi experts,

I would like to transfer Z-fields from VBRP table to CO-PA module. Z fields are added to KOMP structure and filled in EXIT : USEREXIT_PRICING_PREPARE_TKOMP. Moreover assignment in table TKEZU between KOMP and transaction KEDR is created. Standard field is transferred, but Z fields are not. Any ideas how to fix it?

Thank you in advance.

Best regards,

Paul