**Service** [AdRuleService](https://developers.google.com/ad-manager/api/reference/v202605/AdRuleService.RequiredCollectionError) [AdjustmentService](https://developers.google.com/ad-manager/api/reference/v202605/AdjustmentService.RequiredCollectionError) [AdsTxtService](https://developers.google.com/ad-manager/api/reference/v202605/AdsTxtService.RequiredCollectionError) [AudienceSegmentService](https://developers.google.com/ad-manager/api/reference/v202605/AudienceSegmentService.RequiredCollectionError) [CdnConfigurationService](https://developers.google.com/ad-manager/api/reference/v202605/CdnConfigurationService.RequiredCollectionError) [CmsMetadataService](https://developers.google.com/ad-manager/api/reference/v202605/CmsMetadataService.RequiredCollectionError) [CompanyService](https://developers.google.com/ad-manager/api/reference/v202605/CompanyService.RequiredCollectionError) [ContactService](https://developers.google.com/ad-manager/api/reference/v202605/ContactService.RequiredCollectionError) [ContentBundleService](https://developers.google.com/ad-manager/api/reference/v202605/ContentBundleService.RequiredCollectionError) [ContentService](https://developers.google.com/ad-manager/api/reference/v202605/ContentService.RequiredCollectionError) [CreativeService](https://developers.google.com/ad-manager/api/reference/v202605/CreativeService.RequiredCollectionError) [CreativeSetService](https://developers.google.com/ad-manager/api/reference/v202605/CreativeSetService.RequiredCollectionError) [CreativeTemplateService](https://developers.google.com/ad-manager/api/reference/v202605/CreativeTemplateService.RequiredCollectionError) [CreativeWrapperService](https://developers.google.com/ad-manager/api/reference/v202605/CreativeWrapperService.RequiredCollectionError) [CustomFieldService](https://developers.google.com/ad-manager/api/reference/v202605/CustomFieldService.RequiredCollectionError) [CustomTargetingService](https://developers.google.com/ad-manager/api/reference/v202605/CustomTargetingService.RequiredCollectionError) [DaiAuthenticationKeyService](https://developers.google.com/ad-manager/api/reference/v202605/DaiAuthenticationKeyService.RequiredCollectionError) [DaiEncodingProfileService](https://developers.google.com/ad-manager/api/reference/v202605/DaiEncodingProfileService.RequiredCollectionError) [ForecastService](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.RequiredCollectionError) **InventoryService** [LabelService](https://developers.google.com/ad-manager/api/reference/v202605/LabelService.RequiredCollectionError) [LineItemCreativeAssociationService](https://developers.google.com/ad-manager/api/reference/v202605/LineItemCreativeAssociationService.RequiredCollectionError) [LineItemService](https://developers.google.com/ad-manager/api/reference/v202605/LineItemService.RequiredCollectionError) [LineItemTemplateService](https://developers.google.com/ad-manager/api/reference/v202605/LineItemTemplateService.RequiredCollectionError) [LiveStreamEventService](https://developers.google.com/ad-manager/api/reference/v202605/LiveStreamEventService.RequiredCollectionError) [MobileApplicationService](https://developers.google.com/ad-manager/api/reference/v202605/MobileApplicationService.RequiredCollectionError) [NativeStyleService](https://developers.google.com/ad-manager/api/reference/v202605/NativeStyleService.RequiredCollectionError) [NetworkService](https://developers.google.com/ad-manager/api/reference/v202605/NetworkService.RequiredCollectionError) [OrderService](https://developers.google.com/ad-manager/api/reference/v202605/OrderService.RequiredCollectionError) [PlacementService](https://developers.google.com/ad-manager/api/reference/v202605/PlacementService.RequiredCollectionError) [ProposalLineItemService](https://developers.google.com/ad-manager/api/reference/v202605/ProposalLineItemService.RequiredCollectionError) [ProposalService](https://developers.google.com/ad-manager/api/reference/v202605/ProposalService.RequiredCollectionError) [PublisherQueryLanguageService](https://developers.google.com/ad-manager/api/reference/v202605/PublisherQueryLanguageService.RequiredCollectionError) [ReportService](https://developers.google.com/ad-manager/api/reference/v202605/ReportService.RequiredCollectionError) [SegmentPopulationService](https://developers.google.com/ad-manager/api/reference/v202605/SegmentPopulationService.RequiredCollectionError) [SiteService](https://developers.google.com/ad-manager/api/reference/v202605/SiteService.RequiredCollectionError) [StreamActivityMonitorService](https://developers.google.com/ad-manager/api/reference/v202605/StreamActivityMonitorService.RequiredCollectionError) [SuggestedAdUnitService](https://developers.google.com/ad-manager/api/reference/v202605/SuggestedAdUnitService.RequiredCollectionError) [TargetingPresetService](https://developers.google.com/ad-manager/api/reference/v202605/TargetingPresetService.RequiredCollectionError) [TeamService](https://developers.google.com/ad-manager/api/reference/v202605/TeamService.RequiredCollectionError) [UserService](https://developers.google.com/ad-manager/api/reference/v202605/UserService.RequiredCollectionError) [UserTeamAssociationService](https://developers.google.com/ad-manager/api/reference/v202605/UserTeamAssociationService.RequiredCollectionError) [YieldGroupService](https://developers.google.com/ad-manager/api/reference/v202605/YieldGroupService.RequiredCollectionError) **Inheritance** [ApiError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.ApiError) ▼ [AdSenseAccountError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.AdSenseAccountError) [AdUnitCodeError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.AdUnitCodeError) [AdUnitHierarchyError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.AdUnitHierarchyError) [ApiVersionError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.ApiVersionError) [AuthenticationError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.AuthenticationError) [CollectionSizeError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.CollectionSizeError) [CommonError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.CommonError) [CompanyError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.CompanyError) [CreativeWrapperError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.CreativeWrapperError) [CrossSellError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.CrossSellError) [EntityChildrenLimitReachedE...](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.EntityChildrenLimitReachedError "EntityChildrenLimitReachedError") [EntityLimitReachedError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.EntityLimitReachedError) [FeatureError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.FeatureError) [FrequencyCapError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.FrequencyCapError) [InternalApiError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.InternalApiError) [InvalidColorError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.InvalidColorError) [InvalidUrlError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.InvalidUrlError) [InventoryUnitError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.InventoryUnitError) [InventoryUnitRefreshRateError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.InventoryUnitRefreshRateError) [InventoryUnitSizesError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.InventoryUnitSizesError) [LabelEntityAssociationError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.LabelEntityAssociationError) [NotNullError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.NotNullError) [NullError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.NullError) [ParseError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.ParseError) [PermissionError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.PermissionError) [PublisherQueryLanguageConte...](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.PublisherQueryLanguageContextError "PublisherQueryLanguageContextError") [PublisherQueryLanguageSynta...](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.PublisherQueryLanguageSyntaxError "PublisherQueryLanguageSyntaxError") [QuotaError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.QuotaError) [RangeError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.RangeError) [RegExError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.RegExError) **RequiredCollectionError** [RequiredError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.RequiredError) [RequiredNumberError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.RequiredNumberError) [ServerError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.ServerError) [StatementError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.StatementError) [StringFormatError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.StringFormatError) [StringLengthError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.StringLengthError) [TeamError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.TeamError) [TypeError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.TypeError) [UniqueError](https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.UniqueError)

A list of all errors to be used for validating sizes of collections.

*** ** * ** ***

Namespace
:
    `https://www.google.com/apis/ads/publisher/v202605`

| ## Field ||
|---|---|
| **`ApiError` (inherited)** ||
| ### `fieldPath` | ` xsd:string` The OGNL field path to identify cause of error. |
| ### `fieldPathElements` | ` https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.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. |
| **`RequiredCollectionError`** ||
| ### `reason` | ` https://developers.google.com/ad-manager/api/reference/v202605/InventoryService.RequiredCollectionError.Reason ` *** ** * ** *** **Enumerations** `REQUIRED` :   A required collection is missing. `TOO_LARGE` :   Collection size is too large. `TOO_SMALL` :   Collection size is too small. `UNKNOWN` :   The value returned if the actual value is not exposed by the requested API version. <br /> |