<!--
{
  "availability" : [
    "iOS: 27.0.0 -",
    "iPadOS: 27.0.0 -",
    "macCatalyst: 27.0.0 -",
    "macOS: 27.0.0 -",
    "visionOS: 27.0.0 -",
    "watchOS: 27.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "FoundationModels",
  "identifier" : "/documentation/FoundationModels/GeneratedContent/ParsingError/underlyingError",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "Foundation Models"
    ],
    "preciseIdentifier" : "s:16FoundationModels16GeneratedContentV12ParsingErrorV010underlyingF0s0F0_pSgvp"
  },
  "title" : "underlyingError"
}
-->

# underlyingError

The underlying error that caused the parsing failure, if any.

```
var underlyingError: (any Error)?
```

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)