Key legal question
Whether the complaint against the interlocutory evidence order was admissible under Art. 93 BGG / Art. 319 lit. b ZPO.
Extracted holding
No. The refusal of evidence caused no irreparable legal harm because the requested evidence could still be sought later in the proceedings or challenged after the final judgment.
Extracted reasoning
A denied evidentiary measure in principle does not create an irreparable legal disadvantage; procedural or factual disadvantages are insufficient. Since the cantonal procedure allowed the parties to revisit the evidentiary order later, the prerequisite of irreparable harm was absent.