FlowiseAI/Flowise · warning · Error

Limit cannot be less than 0

Error message

Limit cannot be less than 0

What it means

Puppeteer loader equivalent of [171]: a parsed limit integer less than zero is rejected. Null/undefined → 10, 0 → fetch all, negative → error.

Source

Thrown at packages/components/nodes/documentloaders/Puppeteer/Puppeteer.ts:268

                    docs = await loader.load()
                    docs = await textSplitter.splitDocuments(docs)
                } else {
                    docs = await loader.load()
                }
                return docs
            } catch (err) {
                if (process.env.DEBUG === 'true')
                    options.logger.error(`[${orgId}]: Error in PuppeteerWebBaseLoader: ${err.message}, on page: ${url}`)
            }
        }

        let docs: Document[] = []
        if (relativeLinksMethod) {
            if (process.env.DEBUG === 'true') options.logger.info(`[${orgId}]: Start PuppeteerWebBaseLoader ${relativeLinksMethod}`)
            // if limit is 0 we don't want it to default to 10 so we check explicitly for null or undefined
            // so when limit is 0 we can fetch all the links
            if (limit === null || limit === undefined) limit = 10
            else if (limit < 0) throw new Error('Limit cannot be less than 0')
            const pages: string[] =
                selectedLinks && selectedLinks.length > 0
                    ? selectedLinks.slice(0, limit === 0 ? undefined : limit)
                    : relativeLinksMethod === 'webCrawl'
                    ? await webCrawl(url, limit)
                    : await xmlScrape(url, limit)
            if (process.env.DEBUG === 'true')
                options.logger.info(`[${orgId}]: PuppeteerWebBaseLoader pages: ${JSON.stringify(pages)}, length: ${pages.length}`)
            if (!pages || pages.length === 0) throw new Error('No relative links found')
            for (const page of pages) {
                const result = await puppeteerLoader(page)
                if (result) {
                    docs.push(...result)
                }
            }
            if (process.env.DEBUG === 'true') options.logger.info(`[${orgId}]: Finish PuppeteerWebBaseLoader ${relativeLinksMethod}`)
        } else if (selectedLinks && selectedLinks.length > 0) {
            if (process.env.DEBUG === 'true')

View on GitHub (pinned to abe4a8601a)

Solutions

1. Use 0 for all links, a positive int for a cap, or empty for default 10.
2. Clamp variable-sourced values with Math.max(0, limit).
3. Guard NaN after parseInt.

Example fix

// before
let limit = parseInt(nodeData.inputs?.limit as string)
if (limit === null || limit === undefined) limit = 10
else if (limit < 0) throw new Error('Limit cannot be less than 0')
// after
let limit = parseInt(nodeData.inputs?.limit as string)
if (Number.isNaN(limit)) limit = 10
if (limit < 0) throw new Error('Limit cannot be less than 0')

function parseLimit(input) {
  if (input == null || input === '') return 10
  const n = Number(input)
  if (!Number.isFinite(n)) throw new Error('limit must be a number')
  if (n < 0) throw new Error('Limit cannot be less than 0')
  return Math.floor(n)
}

function isNonNegativeInt(v) { return Number.isInteger(v) && v >= 0 }

When it happens

Trigger: limit field set to a negative integer; templated variable resolving to a negative number.

Common situations: User expects -1 to mean unlimited; upstream math produces a negative count; empty string → NaN bypasses the check (latent gap).

Related errors

• Limit cannot be less than 0
• Invalid URL
• No relative links found
• chatflowId must be a valid array
• dataset.rows must be a valid array

AI-assisted analysis of FlowiseAI/Flowise@abe4a8601a (2026-08-12). Data as JSON: /api/errors/5f7b91fcfd9b2814. Report an issue: GitHub.