> ## Documentation Index
> Fetch the complete documentation index at: https://docs.decktalk.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# PAGE_MOTION_UNDECLARED

> Something on the page keeps moving and declares no motion, loop or region, so verify cannot mask it.

Something on the page keeps moving and declares no motion, loop or region, so verify cannot mask it.

This finding is an error, and the page reports it from the browser. `decktalk check` reports it when it judges the project's files before a build, `decktalk record` when it records the pages, and `decktalk verify` when it measures the finished film and reads back each recording log.
Pass `--allow PAGE_MOTION_UNDECLARED` to carry on past it, and `--fail-on` to choose which severity fails a run.

## What to do

Declare it as a motion with `data-motion` or `DeckTalk.motion`, or as a loop with `data-loop`, or give its frame hook the region it draws in.

Troubleshooting says more under [A motion verify cannot measure](/help/troubleshooting#a-motion-verify-cannot-measure).


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