Diagnosis
The distribution customer model has been set up for the message typeV1 in such a way that the recipients can be determined using listsfrom the classification. However, this works only if there is aclassification object present for that message type, which is not thecase here.

Procedure
Either create a classification object in the ALE IMG via the menuoption Enhancements -> Master data distr. -> Extra settings formessage types for this message type in the "Table" field, or switchoff distribution using lists for this message type in the distributioncustomer model.