Marketing campaign does not replicate to ECC
we've a problem with replicating marketing campaigns to ECC. When we have set a replication type to "online" and we send a marketing campaign manual everything works fine. The system is creating a BDOC which is creating a WBS element.
But when we switch replication type to "middleware" the system is also creating a BODC (which is green - no errors appear), but WBS element is not being created.
Does anybody has a clue where to look for a solution?