# 6.  error code 

| code | msg                                        |
| ---- | ------------------------------------------ |
| U1   | Clientid not found                         |
| U2   | Signature error                            |
| V1   | Parameter missing                          |
| E1   | Exceed the limit                           |
| R1   | Orderno repeat                             |
| C1   | Order currency is not set                  |
| P1   | paychannel error                           |
| I1   | Illegal request address                    |
| T1   | Parameter missing（version或tranType）     |
| T2   | Txntype error                              |
| T3   | transaction is not exist or fail           |
| T4   | The maximum amount exceeds the upper limit |

| 99             | System error