---
page_type: error
code: 40145
message: "40145: TaskRouter->Conference"
level: ERROR
product: TaskRouter
---

## Error - 40145

### Call API Error - Conference Instruction

#### Possible Causes

- Un-routable address provided for 'to' field.
- Invalid caller-id passed to 'from' field.
- Missing 'room\_name' field.
- Internal Twilio API error.

#### Possible Solutions

- Make certain 'to' contains a routable phone number, client URI or SIP URI.
- Make certain 'to' is to a country you have permissions set to call.
- Make certain 'from' contains an acceptable caller ID for the chosen 'to' address.
- Make certain 'room\_name' is a valid Conference Room Name.

#### Example

```
{
	"instruction": "conference",
	"room_name": "abc",
	"to": "client:alice",
	"from": "18001234567",
	"post_work_activity_sid": "WA0123456789abcdef0123456789abcdef"
}
```