> ## Documentation Index
> Fetch the complete documentation index at: https://docs.beem.africa/llms.txt
> Use this file to discover all available pages before exploring further.

# SMPP error codes

> Common SMPP status codes returned when send or receive operations fail.

When SMPP send or receive operations fail, the platform returns a numeric status code. The most common codes are listed below.

| Code | Description                                                 |
| ---- | ----------------------------------------------------------- |
| `0`  | No error                                                    |
| `3`  | Invalid command ID                                          |
| `4`  | Invalid bind status for given command                       |
| `5`  | ESME already in bound state                                 |
| `8`  | System error (out of credits)                               |
| `10` | Invalid source address                                      |
| `11` | Invalid destination address                                 |
| `12` | Message ID is invalid                                       |
| `13` | Bind failed                                                 |
| `14` | Invalid password                                            |
| `15` | Invalid system ID                                           |
| `20` | Message queue full                                          |
| `21` | Invalid system type                                         |
| `69` | `submit_sm` failed                                          |
| `88` | Throttling error (ESME has exceeded allowed message limits) |
| `97` | Invalid scheduled delivery time                             |
| `98` | Invalid message validity period                             |

<Warning>
  Status code **8** typically means your account is out of credits. Contact your account manager or top up your balance before retrying.
</Warning>

<Tip>
  Status code **88** indicates throttling. Reduce your submission rate or request a higher throughput limit from Beem.
</Tip>