# Undefined (/docs/errors/chain/Undefined)

Catch-all EVM validation error for cases without a dedicated variant, such as a malformed EIP-7702 authorization list or an unknown validation failure. Inspect the raw transaction for unsupported fields and check the node logs.

Declared by the `EVM` pallet; it classifies to the semantic code [`internal`](/docs/errors/internal).

## Remediation [#remediation]

A chain-side invariant failed; nothing to fix client-side — report it if it persists

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