AI-generated Key Takeaways
- 
          
The content lists various Ad Manager API services and their associated errors, with a focus on
CreativeSetServiceand itsRequiredCollectionError. - 
          
RequiredCollectionErroris used for validating the size of collections and can occur if a required collection is missing, too large, or too small. - 
          
This page provides details on the fields within
ApiErrorandRequiredCollectionError, includingfieldPath,trigger, andreason. - 
          
The
RequiredCollectionError.Reasonenumeration specifies the possible causes for this error:REQUIRED,TOO_LARGE,TOO_SMALL, andUNKNOWN. 
A list of all errors to be used for validating sizes of collections.
- Namespace
 - 
               
https://www.google.com/apis/ads/publisher/v202508 
                        Field | 
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|---|---|
                        
                           ApiError (inherited)
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                  |
                        
                           
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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)}.  | 
                  
                        
                           
                      | 
                     
                         
                            The data that caused the error.  | 
                  
                        
                           
                      | 
                     
                         
                            A simple string representation of the error and reason.  | 
                  
                        
                           RequiredCollectionError
                        
                      | 
                  |
                        
                           
                      | 
                     
                         
                            
 Enumerations 
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