Key legal question
Whether the federal complaint could raise denial-of-hearing complaints without first using the cantonal nullity action.
Extracted holding
Those complaints were inadmissible because the appellant had to exhaust the cantonal nullity remedy before the plenary court of the Appellationshof.
Extracted reasoning
The alleged failure to take evidence, to record submissions, and to file excluded exhibits all amounted to alleged denial of hearing under cantonal procedure and had to be raised under Art. 359 Ziff. 3 ZPO/BE first.