Kernrechtsfrage
Whether the alleged violation of the right to be heard required annulment and remand.
Extrahierter Entscheid
Any deficiency in reasoning or submission of the IV office was either not serious or was cured in the cantonal proceedings and before the Federal Court; no remand was required.
Extrahierte Begründung
The claimant had enough information to challenge the decision effectively, the cantonal court had full review powers, and no mandatory second exchange had been required. A remand would have caused a purely formal delay.