---
title: SKANError.Code.impressionNotFound
framework: storekit
role: symbol
role_heading: Case
path: storekit/skanerror-swift.struct/code/impressionnotfound
---

# SKANError.Code.impressionNotFound

The system can’t find the ad impression.

## Declaration

```swift
case impressionNotFound
```

## Discussion

Discussion This error may occur if an app calls endImpression(_:completionHandler:) before calling startImpression(_:completionHandler:).

## See Also

### Error Codes

- [SKANError.Code.adNetworkIdMissing](storekit/skanerror-swift.struct/code/adnetworkidmissing.md)
- [SKANError.Code.impressionMissingRequiredValue](storekit/skanerror-swift.struct/code/impressionmissingrequiredvalue.md)
- [SKANError.Code.impressionTooShort](storekit/skanerror-swift.struct/code/impressiontooshort.md)
- [SKANError.Code.invalidAdvertisedAppId](storekit/skanerror-swift.struct/code/invalidadvertisedappid.md)
- [SKANError.Code.invalidCampaignId](storekit/skanerror-swift.struct/code/invalidcampaignid.md)
- [SKANError.Code.invalidConversionValue](storekit/skanerror-swift.struct/code/invalidconversionvalue.md)
- [SKANError.Code.invalidSourceAppId](storekit/skanerror-swift.struct/code/invalidsourceappid.md)
- [SKANError.Code.invalidVersion](storekit/skanerror-swift.struct/code/invalidversion.md)
- [SKANError.Code.mismatchedSourceAppId](storekit/skanerror-swift.struct/code/mismatchedsourceappid.md)
- [SKANError.Code.unknown](storekit/skanerror-swift.struct/code/unknown.md)
- [SKANError.Code.unsupported](storekit/skanerror-swift.struct/code/unsupported.md)