# type AdUnitHierarchyError (v202505)

**Service** [InventoryService](https://developers.google.com/ad-manager/api/reference/v202505/InventoryService.AdUnitHierarchyError) **PublisherQueryLanguageService** **Inheritance** [ApiError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ApiError) ▼ [AdUnitCodeError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.AdUnitCodeError) **AdUnitHierarchyError** [ApiVersionError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ApiVersionError) [AudienceSegmentError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.AudienceSegmentError) [AuthenticationError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.AuthenticationError) [CollectionSizeError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.CollectionSizeError) [CommonError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.CommonError) [CreativeError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.CreativeError) [DealError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.DealError) [ExchangeRateError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ExchangeRateError) [FeatureError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.FeatureError) [FileError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.FileError) [InternalApiError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.InternalApiError) [InvalidEmailError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.InvalidEmailError) [InvalidUrlError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.InvalidUrlError) [InventoryTargetingError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.InventoryTargetingError) [InventoryUnitError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.InventoryUnitError) [LineItemFlightDateError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.LineItemFlightDateError) [LineItemOperationError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.LineItemOperationError) [NotNullError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.NotNullError) [NullError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.NullError) [OrderActionError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.OrderActionError) [OrderError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.OrderError) [ParseError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ParseError) [PermissionError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.PermissionError) [PublisherQueryLanguageConte...](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.PublisherQueryLanguageContextError "PublisherQueryLanguageContextError") [PublisherQueryLanguageSynta...](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.PublisherQueryLanguageSyntaxError "PublisherQueryLanguageSyntaxError") [QuotaError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.QuotaError) [RangeError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.RangeError) [RegExError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.RegExError) [RequiredCollectionError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.RequiredCollectionError) [RequiredError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.RequiredError) [RequiredNumberError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.RequiredNumberError) [RequiredSizeError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.RequiredSizeError) [ReservationDetailsError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ReservationDetailsError) [ServerError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ServerError) [StatementError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.StatementError) [StringFormatError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.StringFormatError) [StringLengthError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.StringLengthError) [TypeError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.TypeError) [UniqueError](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.UniqueError)

Caused by creating an [AdUnit](https://developers.google.com/ad-manager/api/reference/v202505/InventoryService.AdUnit) object with an invalid hierarchy.

*** ** * ** ***

Namespace
:
    `https://www.google.com/apis/ads/publisher/v202505`

| ## Field ||
|---|---|
| **`ApiError` (inherited)** ||
| ### `fieldPath` | ` xsd:string` The OGNL field path to identify cause of error. |
| ### `fieldPathElements` | ` https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.FieldPathElement[]` A parsed copy of the field path. For example, the field path "operations\[1\].operand" corresponds to this list: {FieldPathElement(field = "operations", index = 1), FieldPathElement(field = "operand", index = null)}. |
| ### `trigger` | ` xsd:string` The data that caused the error. |
| ### `errorString` | ` xsd:string` A simple string representation of the error and reason. |
| **`AdUnitHierarchyError`** ||
| ### `reason` | ` https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.AdUnitHierarchyError.Reason ` *** ** * ** *** **Enumerations** `INVALID_DEPTH` :   The depth of the [AdUnit](https://developers.google.com/ad-manager/api/reference/v202505/InventoryService.AdUnit) in the inventory hierarchy is greater than is allowed. The maximum allowed depth is two below the effective root ad unit for Ad Manager 360 accounts and is one level below the effective root ad unit for Ad Manager accounts. `INVALID_PARENT` :   The only valid [AdUnit.parentId](https://developers.google.com/ad-manager/api/reference/v202505/InventoryService.AdUnit#parentId) for an Ad Manager account is the [Network.effectiveRootAdUnitId](https://developers.google.com/ad-manager/api/reference/v202505/NetworkService.Network#effectiveRootAdUnitId), Ad Manager 360 accounts can specify an ad unit hierarchy with more than two levels. `UNKNOWN` :   The value returned if the actual value is not exposed by the requested API version. <br /> |