FailedToExtractRuntimeVersion
Error v101 → current 0.2The chain couldn't read version information from the new runtime code.
Encountered by: validatorsdevelopers
Why This Error Exists
Every Substrate runtime must expose its version via the Core_version API. If this can't be read, the chain can't verify the upgrade is safe. The WASM is likely corrupted or not a valid Substrate runtime.
From Chain Metadata
Failed to extract the runtime version from the new runtime. Either calling `Core_version` or decoding `RuntimeVersion` failed.
What This Means
The chain couldn't read version information from the new runtime code.
Common Causes
- Corrupted WASM binary
- Invalid or malformed runtime code
- Missing Core_version runtime API
How to Fix
- Verify the WASM binary is not corrupted
- Rebuild the runtime from source
- Ensure the runtime implements required APIs
Storage to Check
Runtime Info
- Pallet Index
- 0
- Error Index
- 2
- Error Code
- 0.2
- Runtime Version
- v393