AI-generated Key Takeaways
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LineItemActivityAssociationError is an error specific to associating activities with line items within the Google Ad Manager API.
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This error can occur if the activity does not belong to the same advertiser as the line item or if the line item's cost type is not CPA.
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The error details include fields inherited from ApiError such as
fieldPath,fieldPathElements,trigger, anderrorString, along with a specificreasonenum. - 
          
The possible reasons for this error are
INVALID_ACTIVITY_FOR_ADVERTISER,INVALID_COST_TYPE_FOR_ASSOCIATION, andUNKNOWN. 
Errors specific to associating activities to line items.
- Namespace
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https://www.google.com/apis/ads/publisher/v202508 
                        Field | 
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                           ApiError (inherited)
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                            The OGNL field path to identify cause of error.  | 
                  
                        
                           
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                         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)}.  | 
                  
                        
                           
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                            The data that caused the error.  | 
                  
                        
                           
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                            A simple string representation of the error and reason.  | 
                  
                        
                           LineItemActivityAssociationError
                        
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                            The error reason represented by an enum. Enumerations 
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