# X_VERIFY_SHARD_INVALID

## Means

x verify --shard was given a spec or a step list it cannot split

## Typical cause

the spec is not i/n with 1<=i<=n, --only is missing, or --only names a step that is not unit, contract or job

## Fix

x verify --only unit --shard 1/4 --json

[CLI and verify](/error-codes#cli-and-verify)