# TooFew (/docs/errors/chain/TooFew)

The bulk preimage upgrade was requested with zero hashes, so there is nothing to do. Pass at least one hash to `ensure_updated`.

Declared by the `Preimage` pallet; it classifies to the semantic code [`invalid_argument`](/docs/errors/invalid-argument).

## Remediation [#remediation]

Check the argument values against the operation schema

The same explanation is available in the terminal: `btcli explain TooFew`.