Cassation dismissed for procedural defect; only material law violation raised despite procedural claims.

The Supreme Court dismissed the cassation appeal filed by a claimant against a Social Insurance Institution's denial of disability pension. The claimant argued for a material law violation regarding the 18-month disability onset rule and a procedural defect due to missing medical opinions. The court ruled that since the appeal only cited a material law error without specifying a violated procedural article, the procedural claim was inadmissible, limiting review to the established facts.