Kernrechtsfrage
Whether the federal complaint was admissible despite an available cantonal nullity appeal to the Zurich Cassation Court.
Extrahierter Entscheid
The complaint was inadmissible because the cantonal appellate remedy had not been exhausted.
Extrahierte Begründung
A civil complaint to the Federal Supreme Court lies only against decisions of the last cantonal instance; since a cantonal nullity appeal remained available, the exhaustion requirement was not met.