---
page_type: error
code: 16028
message: "16028: Participant to be whispered is not present in the conference"
level: ERROR
product: Programmable Voice
---

## Description

The participant to be whispered is not present in the conference, so the coach to the participant cannot be added to the conference.

### Possible Causes

This may because the specified participant is not yet connected to the conference or no longer connected to the conference.

### Possible Solutions

Validate that this call is connecting to the correct conference and the call SID specified is also in the conference.