Question juridique clé
Whether the cantonal court wrongly refused the claimant's request to amend the claim and enter into the merits.
Solution extraite
The cantonal court could, without arbitrariness, refuse the claim amendment as causing undue delay of the pending proceedings.
Motifs extraits
Federal law on occupational pensions contains no rule on enlarging the claim before the last cantonal instance, so cantonal procedural law applies. Under § 61 ZPO/ZH, an amendment may be refused if it would unduly delay the proceedings. The claimant did not challenge the characterization of his filing as an amendment and failed to show arbitrariness in the lower court's balancing.