NousResearch/hermes-agent · error · Error

Cannot restore an empty message.

Error message

Cannot restore an empty message.

What it means

Error "Cannot restore an empty message." thrown in NousResearch/hermes-agent.

Source

Thrown at apps/desktop/src/app/session/hooks/use-prompt-actions/rewind.ts:316

export function planRestore(messages: ChatMessage[], messageId: string, target?: RestoreTarget): RestorePlan {
  const idIndex = messages.findIndex(m => m.id === messageId && m.role === 'user')

  const fallbackIndex =
    target?.userOrdinal === null || target?.userOrdinal === undefined
      ? -1
      : visibleUserIndexAtOrdinal(messages, target.userOrdinal)

  const sourceIndex = idIndex >= 0 ? idIndex : fallbackIndex
  const source = messages[sourceIndex]

  if (!source || source.role !== 'user') {
    throw new Error('Could not find the message to restore.')
  }

  const text = (chatMessageText(source).trim() || target?.text?.trim() || '').trim()

  if (!text) {
    throw new Error('Cannot restore an empty message.')
  }

  const truncateOrdinal =
    target?.userOrdinal === null || target?.userOrdinal === undefined
      ? visibleUserOrdinal(messages, sourceIndex)
      : target.userOrdinal

  return { sourceIndex, text, truncateOrdinal, truncateMessageId: source.id, truncateRowId: source.rowId }
}

// ---------------------------------------------------------------------------
// Edit (revert + resubmit with new text)
// ---------------------------------------------------------------------------

export interface EditPlan {
  editedMessage: ChatMessage
  isFailedTurn: boolean
  sourceIndex: number

View on GitHub (pinned to c896c09c42)

Solutions

1. Choose a message that has text content to restore.
2. Edit the message content first, then restore.

When it happens

Trigger: Thrown at apps/desktop/src/app/session/hooks/use-prompt-actions/rewind.ts:316 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of NousResearch/hermes-agent@c896c09c42 (2026-08-14). Data as JSON: /api/errors/3d84be50ecc5de68. Report an issue: GitHub.