AI-generated Key Takeaways
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DayPartTargetingError.Reasonprovides the reasons for targeting errors related to day parts. - 
          
Errors can occur due to invalid hours or minutes in day part targeting.
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End time must be after start time and time periods cannot overlap.
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An
UNKNOWNreason is returned if the actual value is not exposed by the API version. 
                  Service
               
               
            
                  Dependencies
               
               
                  DayPartTargetingError
                  
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                  DayPartTargetingError.Reason
               The reasons for the target error.
- Namespace
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https://www.google.com/apis/ads/publisher/v202508 
| Enumeration | Description | 
|---|---|
                        INVALID_HOUR
                      | 
                     Hour of day must be between 0 and 24, inclusive. | 
                        INVALID_MINUTE
                      | 
                     Minute of hour must be one of 0, 15,30, 45. | 
                        END_TIME_NOT_AFTER_START_TIME
                      | 
                     The DayPart.endTime cannot be after DayPart.startTime. | 
                        TIME_PERIODS_OVERLAP
                      | 
                     Cannot create day-parts that overlap. | 
                        UNKNOWN
                      | 
                     The value returned if the actual value is not exposed by the requested API version. |