Question juridique clé
Whether the appeal against the interlocutory ruling rejecting the res judicata objection is admissible under Art. 93 BGG.
Solution extraite
The appeal was not admissible because no irreparable legal disadvantage was shown and the conditions for immediate review to save considerable time or costs were not established.
Motifs extraits
The alleged disadvantages were mainly factual; possible duplicate litigation and enforcement issues did not amount to a legal disadvantage. The appellant also failed to show concretely that an immediate federal decision would avoid extensive evidence-taking.