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AI-generated Key Takeaways
The EntityChildrenLimitReachedError is an error related to having too many child entities associated with a parent entity.
This error can occur across various services including Audience Segment, Custom Targeting, Forecast, Inventory, Line Item, Native Style, Order, and Placement Services.
The error inherits from ApiError and includes fields such as fieldPath, fieldPathElements, trigger, and errorString.
Specific reasons for this error are enumerated, such as reaching the limit for line items on an order, creative associations for a line item, or ad units for a placement.
Other reasons include limits on targeting expressions, custom targeting values, attachments for proposals, and various product and rate card related limits.
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.
The number of product template and product base rates on the rate card (including excluded
product base rates) exceeds the max number allowed per rate card in the network.
The number of ad units on AdExclusionRule.inventoryTargeting exceeds the max number
of ad units allowed per ad exclusion rule inventory targeting in the network.
NATIVE_STYLE_LIMIT_FOR_NATIVE_AD_FORMAT_REACHED
The number of native styles under the native creative template exceeds the
max number of native styles allowed per native creative template in the
network.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-13 UTC."],[],[]]