I would like to know how to deal with the posting periods T.code OB52. There are some fixed variables. By trying to work with the Incoming Invoice (MIRO) the system is asking me to enter a valid posting period. There is in this screen a variant name to enter. This variant name is nothing but a company code. So when i hit the button New entries and enter my company code 0005 system tells me that this variant name is not existing. Could anybody tell me how to set thi posting periods?