Kernrechtsfrage
Whether the public law appeal against the cantonal interlocutory decision was admissible under Art. 87 OG
Extrahierter Entscheid
The appeal was inadmissible because the refusal of evidence was an interlocutory decision that did not cause irreparable legal harm.
Extrahierte Begründung
Evidence-related interlocutory decisions generally do not create irreparable legal prejudice; the applicant can raise the issue later against the final decision, and an expert report can be requested again at trial.