# FailedToExtractRuntimeVersion (/docs/errors/chain/FailedToExtractRuntimeVersion)

The new runtime code passed to `set_code` did not yield a readable version: calling `Core_version` or decoding `RuntimeVersion` failed. Check that the submitted blob is a valid, complete runtime wasm and not truncated or compressed incorrectly.

Declared by the `System` 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 FailedToExtractRuntimeVersion`.