AI-generated Key Takeaways
- 
          CustomFieldService is associated with various types of API errors including authentication, size, common, and feature errors. 
- 
          CustomFieldError is specifically related to errors encountered when editing custom fields. 
- 
          The ApiErrorincludes fields such asfieldPath,fieldPathElements,trigger, anderrorStringto help identify the cause of an error.
- 
          The CustomFieldErrorincludes areasonfield with specific enumerations likeINVALID_CUSTOM_FIELD_FOR_OPTIONandUNKNOWNexplaining the error reason.
Errors specific to editing custom fields
- Namespace
- 
               https://www.google.com/apis/ads/publisher/v202508
| Field | |
|---|---|
| ApiError(inherited) | |
| 
                            | 
                            The OGNL field path to identify cause of error. | 
| 
                            | 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. | 
| CustomFieldError | |
| 
                            | The error reason represented by an enum. Enumerations 
 |