Is-Retail BETMAS config

Hi,

I need to create 1800 sites, I'm trying to use IDOC BETMAS01.

I check note 737239, I config Partner profiles, I introduce BETMAS01 on Inbound parameters, but I don't know which process code I have to use. I test with BAPI, APLI and UPSR.

Any of you know which process code I have to use or if I need to create a new one.

Thanks