moeru-ai/airi · error · Error

Replicate returned an empty output array.

Error message

Replicate returned an empty output array.

What it means

Thrown when the output is an Array.isArray but items.length === 0. Replicate returned a structurally valid but empty output array — the prediction resolved with zero generated items. Sibling to [41] (null output) and [42] (unrecognizable item).

Source

Thrown at apps/stage-tamagotchi/src/main/services/airi/widgets/providers/replicate.ts:171

        else if (typeof first === 'object' && first !== null && 'url' in first && typeof (first as any).url === 'string') {
          imageUrl = (first as any).url
        }
        // Case 3: Simple string (the URL itself)
        else if (typeof first === 'string') {
          imageUrl = first
        }

        if (imageUrl && (imageUrl.startsWith('http') || imageUrl.startsWith('data:'))) {
          log.log(`[Replicate] EXTRACTED IMAGE: ${imageUrl.startsWith('data:') ? 'DATA_URL' : imageUrl}`)
          this.updateStatus(jobId, { status: 'succeeded', progress: 100, imageUrl })
        }
        else {
          log.error(`[Replicate] Failed to extract URL from output: ${JSON.stringify(first)}`)
          throw new Error('Output does not contain a recognizable image URL.')
        }
      }
      else {
        throw new Error('Replicate returned an empty output array.')
      }
    }
    catch (error: any) {
      const errorMessage = error.message || (typeof error === 'object' ? JSON.stringify(error) : String(error))
      log.error(`[Replicate] Generation Failed for ${jobId}: ${errorMessage}`)
      this.updateStatus(jobId, {
        status: 'failed',
        error: errorMessage,
        actionLabel: `Error: ${errorMessage.slice(0, 50)}${errorMessage.length > 50 ? '...' : ''}`,
      })
    }
    finally {
      // Clean up callback and job result after completion to prevent memory leaks
      setTimeout(() => {
        this.callbacks.delete(jobId)
        this.jobResults.delete(jobId)
      }, 10000)
    }

View on GitHub (pinned to 27111382b4)

Solutions

1. Retry with a different prompt to rule out a safety-filter block.
2. Inspect request.extra and the merged inputOptions to ensure no option forces zero outputs (e.g. num_outputs: 0).
3. Check the Replicate prediction page for the run to see if outputs were filtered.
4. If persistent, switch models — some community models intermittently return empty arrays.

function isNonEmptyOutputArray(output: unknown): output is unknown[] {
  return Array.isArray(output) && output.length > 0
}

try {
  await provider.runGeneration(jobId, model, inputOptions)
} catch (e) {
  if (e instanceof Error && e.message.includes('empty output array')) {
    // retry once with a sanitized prompt
  } else throw e
}

When it happens

Trigger: An image model that normally returns multiple outputs returned none for this run; nsfw/safety filter blocked every output; model misconfigured with num_outputs=0 via extra options.

Common situations: Prompt tripped Replicate/model safety filters; model-specific `num_outputs` option set to 0 in request.extra; degenerate prediction on the platform.

Related errors

• No output received from Replicate.
• Replicate provider is not configured. Missing API Key.
• Output does not contain a recognizable image URL.
• Failed to generate image: ${artistryResult.error || 'No outp
• Failed to fetch image: ${response.statusText}

AI-assisted analysis of moeru-ai/airi@27111382b4 (2026-08-12). Data as JSON: /api/errors/6d66a52afb2445bb. Report an issue: GitHub.