---
page_type: error
code: 35111
message: "35111: SendAt timestamp is missing"
level: ERROR
product: Programmable SMS
---

## Description

You must indicate SendAt timestamp if ScheduleType is 'fixed'.

### Possible Causes

You did not indicate SendAt timestamp.

### Possible Solutions

Check if there is a valid timestamp entered for SendAt when ScheduleType is 'fixed'.