# 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