# Error Reference

* **Error Codes**: Each error returned by the protocol is documented with its meaning and recommended handling.
* **Common Errors**:
  * `ERR_NO_SOLVER`: No solver available for the requested intent.
  * `ERR_INVALID_QUOTE`: Submitted quote does not meet protocol requirements.
  * `ERR_EXECUTION_FAILED`: On-chain execution did not complete as expected.
  * `ERR_VERIFICATION_FAILED`: Protocol could not verify on-chain fulfillment.
  * (See full error list in the [API documentation](https://api.plutonlabs.xyz/swagger#/).)


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