**Service** [CreativeService](https://developers.google.com/ad-manager/api/reference/v202605/CreativeService.RequiredSizeError) [CreativeSetService](https://developers.google.com/ad-manager/api/reference/v202605/CreativeSetService.RequiredSizeError) **ForecastService** [LineItemCreativeAssociationService](https://developers.google.com/ad-manager/api/reference/v202605/LineItemCreativeAssociationService.RequiredSizeError) [LineItemService](https://developers.google.com/ad-manager/api/reference/v202605/LineItemService.RequiredSizeError) [LineItemTemplateService](https://developers.google.com/ad-manager/api/reference/v202605/LineItemTemplateService.RequiredSizeError) [NativeStyleService](https://developers.google.com/ad-manager/api/reference/v202605/NativeStyleService.RequiredSizeError) [OrderService](https://developers.google.com/ad-manager/api/reference/v202605/OrderService.RequiredSizeError) [PublisherQueryLanguageService](https://developers.google.com/ad-manager/api/reference/v202605/PublisherQueryLanguageService.RequiredSizeError) **Inheritance** [ApiError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ApiError) ▼ [AdUnitCodeError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.AdUnitCodeError) [ApiVersionError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ApiVersionError) [AssetError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.AssetError) [AudienceSegmentError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.AudienceSegmentError) [AuthenticationError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.AuthenticationError) [ClickTrackingLineItemError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ClickTrackingLineItemError) [CollectionSizeError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.CollectionSizeError) [CommonError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.CommonError) [CompanyCreditStatusError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.CompanyCreditStatusError) [CreativeError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.CreativeError) [CrossSellError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.CrossSellError) [CurrencyCodeError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.CurrencyCodeError) [CustomFieldValueError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.CustomFieldValueError) [CustomTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.CustomTargetingError) [DateError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.DateError) [DateTimeRangeTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.DateTimeRangeTargetingError) [DayPartTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.DayPartTargetingError) [EntityChildrenLimitReachedE...](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.EntityChildrenLimitReachedError "EntityChildrenLimitReachedError") [EntityLimitReachedError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.EntityLimitReachedError) [FeatureError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.FeatureError) [ForecastError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ForecastError) [FrequencyCapError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.FrequencyCapError) [GenericTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.GenericTargetingError) [GeoTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.GeoTargetingError) [GrpSettingsError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.GrpSettingsError) [ImageError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ImageError) [InternalApiError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.InternalApiError) [InvalidUrlError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.InvalidUrlError) [InventoryTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.InventoryTargetingError) [InventoryUnitError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.InventoryUnitError) [LabelEntityAssociationError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.LabelEntityAssociationError) [LineItemActivityAssociation...](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.LineItemActivityAssociationError "LineItemActivityAssociationError") [LineItemCreativeAssociation...](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.LineItemCreativeAssociationError "LineItemCreativeAssociationError") [LineItemError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.LineItemError) [LineItemFlightDateError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.LineItemFlightDateError) [LineItemOperationError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.LineItemOperationError) [MobileApplicationTargetingE...](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.MobileApplicationTargetingError "MobileApplicationTargetingError") [NotNullError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.NotNullError) [NullError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.NullError) [OrderActionError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.OrderActionError) [OrderError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.OrderError) [ParseError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ParseError) [PermissionError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.PermissionError) [PrecisionError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.PrecisionError) [ProgrammaticError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ProgrammaticError) [PublisherProvidedSignalsTar...](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.PublisherProvidedSignalsTargetingError "PublisherProvidedSignalsTargetingError") [PublisherQueryLanguageConte...](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.PublisherQueryLanguageContextError "PublisherQueryLanguageContextError") [PublisherQueryLanguageSynta...](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.PublisherQueryLanguageSyntaxError "PublisherQueryLanguageSyntaxError") [QuotaError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.QuotaError) [RangeError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.RangeError) [RegExError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.RegExError) [RequestError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.RequestError) [RequestPlatformTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.RequestPlatformTargetingError) [RequiredCollectionError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.RequiredCollectionError) [RequiredError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.RequiredError) [RequiredNumberError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.RequiredNumberError) **RequiredSizeError** [ReservationDetailsError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ReservationDetailsError) [ServerError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ServerError) [SetTopBoxLineItemError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.SetTopBoxLineItemError) [StatementError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.StatementError) [StringFormatError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.StringFormatError) [StringLengthError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.StringLengthError) [TeamError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.TeamError) [TechnologyTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.TechnologyTargetingError) [TimeZoneError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.TimeZoneError) [TranscodingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.TranscodingError) [TypeError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.TypeError) [UniqueError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.UniqueError) [UserDomainTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.UserDomainTargetingError) [VideoPositionTargetingError](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.VideoPositionTargetingError)

A list of all errors to be used for validating [Size](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.Size).

*** ** * ** ***

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/ForecastService.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. |
| **`RequiredSizeError`** ||
| ### `reason` | ` https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.RequiredSizeError.Reason ` *** ** * ** *** **Enumerations** `REQUIRED` : [Creative.size](https://developers.google.com/ad-manager/api/reference/v202605/CreativeService.Creative#size) or [LineItem.creativePlaceholders](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.LineItem#creativePlaceholders) size is missing. `NOT_ALLOWED` : [LineItemCreativeAssociation.sizes](https://developers.google.com/ad-manager/api/reference/v202605/LineItemCreativeAssociationService.LineItemCreativeAssociation#sizes) must be a subset of [LineItem.creativePlaceholders](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.LineItem#creativePlaceholders) sizes. `UNKNOWN` :   The value returned if the actual value is not exposed by the requested API version. <br /> |