# 30009: Missing inbound segment

Log Type: CARRIER

Log Level: ERROR

## Description

This error occurs when not every segment of a multi-part inbound message is received. Long SMS messages are sent as multiple segments, and inbound Message records expose the total segment count in `num_segments`.

### Possible causes

* The mobile network or carrier didn't successfully send the entire message to Twilio.
* The sender's handset didn't successfully send all segments.
* The sender was in poor network coverage, which caused an incomplete message to be sent.

### Possible solutions

* Ask the sender to try sending the message again from an area with stronger network coverage.
* If the sender is sending a long SMS, ask them to shorten the message or send it as multiple separate messages. SMS messages longer than a single segment are concatenated into multiple segments, so reducing the number of segments can reduce the chance that one segment is missed.
* If this issue occurs repeatedly for multiple users, collect the affected Message SIDs and contact Support for investigation.

#### Additional resources

* [Receive and Reply to Incoming Messages](/docs/messaging/tutorials/how-to-receive-and-reply)
* [Message resource](/docs/messaging/api/message-resource)
* [How long can a message be?](/docs/glossary/what-sms-character-limit)