Create Customer from Business Partner

Hi,

i am trying to create a customer when creating a new Business Partner from the RE80.

For vendors everything works as expected.

When I create a customer contract partner, I get a temporary customer number ##1.

When I save I get the Error Message REBPBP004 - No customer assigned to business partner &1

The number range is internal. PPOs are activated and synchronization options are active as well.

I read SAP-Note 956054 and implemented all the changes required. Any further known issues?

Any help is appreciated!

Regards,

Jan-Christian Kaspareit