# Transaction Error Codes

Klaytn은 트랜잭션 영수증의 `txError` 필드를 통해 트랜잭션 실행이 실패한 원인을 개발자분들께 알려드립니다. This field exists only if the transaction execution is failed. To save storage and network bandwidth, `txError` contains an integer value. The below table shows the meaning of the value in `txError`.

| Error Code | Description                                                               |
| ---------- | ------------------------------------------------------------------------- |
| 0x02       | VM error occurs while running smart contract                              |
| 0x03       | max call depth exceeded                                                   |
| 0x04       | contract address collision                                                |
| 0x05       | contract creation code storage out of gas                                 |
| 0x06       | evm: max code size exceeded                                               |
| 0x07       | out of gas                                                                |
| 0x08       | evm: write protection                                                     |
| 0x09       | evm: execution reverted                                                   |
| 0x0a       | 트랜잭션의 Opcode 연산 비용의 한계가 (100000000)에 도달하였습니다.                             |
| 0x0b       | account already exists                                                    |
| 0x0c       | 프로그램 계정(예를 들어, 코드 및 스토리지를 갖고 있는 계정)이 아닙니다.                                |
| 0x0d       | Human-readable address is not supported now                               |
| 0x0e       | 트랜잭션 수수료의 비율이 \[1, 99] 범위를 벗어났습니다.                                        |
| 0x0f       | AccountKeyFail is not updatable                                           |
| 0x10       | different account key type                                                |
| 0x11       | AccountKeyNil cannot be initialized to an account                         |
| 0x12       | public key is not on curve                                                |
| 0x13       | key weight is zero                                                        |
| 0x14       | key is not serializable                                                   |
| 0x15       | duplicated key                                                            |
| 0x16       | weighted sum overflow                                                     |
| 0x17       | unsatisfiable threshold. Weighted sum of keys is less than the threshold. |
| 0x18       | length is zero                                                            |
| 0x19       | length too long                                                           |
| 0x1a       | nested composite type                                                     |
| 0x1b       | a legacy transaction must be with a legacy account key                    |
| 0x1c       | deprecated feature                                                        |
| 0x1d       | not supported                                                             |
| 0x1e       | smart contract code format is invalid                                     |