# 40142: Failed to issue Conference instruction due to missing 'call\_sid' or 'outbound\_to' properties

Log Type: APPLICATION

Log Level: ERROR

## Description

### Possible causes

* The Task was not created via the `<Enqueue>` verb. (Inbound Voice call)
* The `call_sid` property is missing the Task's attributes. (Inbound Voice call)
* The `outbound_to` property is missing in the Task's attributes. (Outbound Voice call)

### Possible solutions

* Ensure that the Conference instruction is issued on an `<Enqueue>` created Task. (Inbound Voice call)
* Ensure that 'outbound\_to' property is present in the Task's attributes. (Outbound Voice call)