---
title: "advertiser(_:didNotStartAdvertisingPeer:)"
framework: multipeerconnectivity
role: symbol
role_heading: Instance Method
path: "multipeerconnectivity/mcnearbyserviceadvertiserdelegate/advertiser(_:didnotstartadvertisingpeer:)"
---

# advertiser(_:didNotStartAdvertisingPeer:)

Called when advertisement fails.

## Declaration

```swift
optional func advertiser(_ advertiser: MCNearbyServiceAdvertiser, didNotStartAdvertisingPeer error: any Error)
```

## Parameters

- `advertiser`: The advertiser object that failed to begin advertising.
- `error`: An error object that indicates what went wrong.