Whether the appeal against the refusal to join the two cases was admissible without showing irreparable harm.
A refusal to order joinder of cases is an appealable 'other decision' only if the appellant demonstrates that it may cause irreparable harm within the meaning of Article 319(b)(2) CPC.
The court held that the refusal of joinder is not an instruction order but a final procedural decision on the course of the debate; because no statutory appeal lies, review is available only under Article 319(b)(2) CPC if difficult-to-repair prejudice is shown. The appellant did not allege or prove such prejudice.