ESME_RINVCMDID in SMPP

What is ESME_RINVCMDID?

ESME_RINVCMDID (Error Code: 0x00000003) is an SMPP error that indicates an invalid command ID was sent in the SMPP request.

Possible Causes

• Sending an unsupported or unknown command ID.
• Using an incorrect format for the SMPP PDU.
• Communication issues leading to a corrupted PDU.
• Malformed request where the command ID is not properly set.

When Does It Happen?

This error occurs when an SMPP PDU (e.g., bind_transmitter, submit_sm, etc.) is sent with an invalid or unrecognized command ID.

Example SMPP PDU Transaction

The following is an example of an incorrect bind_transmitter PDU with an invalid command ID:

0000001C (Length)
0000FFFF (Invalid Command ID)
00000000 (Command Status)
00000001 (Sequence Number)
74657374 000000 (System ID: "test")
000000 (Password)

Issue: The command ID 0x0000FFFF is not recognized as a valid SMPP command.

Correct bind_transmitter PDU example:

0000001C (Length)
00000002 (Command ID for bind_transmitter)
00000000 (Command Status)
00000001 (Sequence Number)
74657374 000000 (System ID: "test")
000000 (Password)

How to Solve It?

• Ensure the command ID is valid and supported by SMPP v3.4 or v5.0.
• Verify that the PDU format follows the correct SMPP protocol structure.
• Check for communication errors that might be corrupting the request.
• Enable debugging to log and analyze SMPP requests before sending.

If the issue persists, consult the SMSC documentation to ensure proper usage of command IDs.