# Filter runtime logs for fatal function errors

By Steven Van · 2025-06-10

Vercel's runtime logs add a Fatal level filter that flags crashed function invocations as "Invocation Failed".

Runtime logs on [Vercel](<https://creatorstoolbox.com/tools/vercel>) can now be filtered to show fatal function errors, such as Node.js crashes, using the new Fatal option in the levels filter. When a log entry is a fatal error, the invocation details panel shows **Invocation Failed**.

The [Fatal filter](<https://vercel.com/docs/runtime-logs>) sits alongside the existing Warning and Error levels in the Logs tab.

![Layout to visualize the runtime logs.](<https://7nyt0uhk7sse4zvn.public.blob.vercel-storage.com/front/docs/observability/request-log-overview-light.png?lightbox>)

The runtime logs view in Vercel, where fatal errors can now be filtered.

![Layout to visualize the runtime logs in live mode.](<https://7nyt0uhk7sse4zvn.public.blob.vercel-storage.com/front/docs/observability/request-live-logs-light.png?lightbox>)

The runtime logs view in live mode, where fatal errors can now be filtered.

![Vercel](<https://www.google.com/s2/favicons?domain=vercel.com&sz=128>)

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[Original source](<https://vercel.com/docs/runtime-logs>)

[Read Filter runtime logs for fatal function errors on Creators Toolbox](<https://creatorstoolbox.com/blog/vercel-filter-runtime-logs-for-fatal-function-errors>)

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Canonical source: https://creatorstoolbox.com/blog/vercel-filter-runtime-logs-for-fatal-function-errors