Question juridique clé
Whether the appeal was admissible against the testamentary executor Z.
Solution extraite
The appeal was inadmissible as against Z. because his incidental appeal had already been declared inadmissible and he was no longer a party before the Federal Supreme Court.
Motifs extraits
A person who is no longer a party in the cantonal proceedings lacks standing in the federal appeal; the judgment could only be communicated to him.