**Service** **ForecastService** [LineItemService](https://developers.google.com/ad-manager/api/reference/v202605/LineItemService.ClickTrackingLineItemError) [LineItemTemplateService](https://developers.google.com/ad-manager/api/reference/v202605/LineItemTemplateService.ClickTrackingLineItemError) [OrderService](https://developers.google.com/ad-manager/api/reference/v202605/OrderService.ClickTrackingLineItemError) **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** [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](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.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)

Click tracking is a special line item type with a number of unique errors as
described below.

*** ** * ** ***

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. |
| **`ClickTrackingLineItemError`** ||
| ### `reason` | ` https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.ClickTrackingLineItemError.Reason ` The error reason represented by an enum. *** ** * ** *** **Enumerations** `TYPE_IMMUTABLE` :   The line item type cannot be changed once created. `INVALID_TARGETING_TYPE` :   Click tracking line items can only be targeted at ad unit inventory, all other types are invalid, as well as placements. `INVALID_ROADBLOCKING_TYPE` :   Click tracking line items do not allow us to control creative delivery so are by nature one or more as entered by the third party. `INVALID_CREATIVEROTATION_TYPE` :   Click tracking line items do not support the [CreativeRotationType.OPTIMIZED](https://developers.google.com/ad-manager/api/reference/v202605/ForecastService.CreativeRotationType#OPTIMIZED) creative rotation type. `INVALID_DELIVERY_RATE_TYPE` :   Click tracking line items do not allow us to control line item delivery so we can not control the rate at which they are served. `UNSUPPORTED_FIELD` :   Not all fields are supported by the click tracking line items. `UNKNOWN` :   The value returned if the actual value is not exposed by the requested API version. <br /> |