Message: Enter a country for partner xyz with type 'requester'

We are using SRM Server 500.

I am customizing a new installation. When I create a SC in classic scenario using "Describe Requirement" I get following messages:

"Enter a country for partner 0000000081 with type requester."

"Enter a country for partner 0000000081 with type goods recipient."

I didn't enter a source of supply, the partner number 0000000081 is a BP that belongs to the user in who creates the SC, as I can see in ppoma_bbp.

All org-units are matched up in TA BBP_BP_OM_INTEGRATE.

In TA BP I checked the address of 0000000081. Everything is ok, country is entered. What I cannot find is Partner type 'Requester' or 'Goods Recipient' in TA BP.

I never had this Problem befor and I customized a few SRM, EBP, BBP, B2B systems. Has anybody an idea?

Thank you for your response.