AI-generated Key Takeaways
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The content lists various Ad Manager API services with links to their StatementError.Reason documentation for the v202508 version.
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The StatementError.Reason is an enumeration within the TargetingPresetService with specific codes and descriptions for errors related to statements.
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The two known reasons for a StatementError are
VARIABLE_NOT_BOUND_TO_VALUEandUNKNOWN. 
- Namespace
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https://www.google.com/apis/ads/publisher/v202508 
| Enumeration | Description | 
|---|---|
                        VARIABLE_NOT_BOUND_TO_VALUE
                      | 
                     A bind variable has not been bound to a value. | 
                        UNKNOWN
                      | 
                     The value returned if the actual value is not exposed by the requested API version. |