# Neptune Service Errors
<a name="errors"></a>

Amazon Neptune has two different sets of errors:
+ The graph engine errors that are for the Neptune DB cluster endpoints only.
+ The errors that are associated with the APIs for creating and modifying Neptune resources with the Amazon SDK and Amazon Command Line Interface (Amazon CLI).

**Topics**
+ [Insufficient DB instances available](insufficientDBInstancesAvailable.md)
+ [Graph Engine Error Messages and Codes](errors-engine-codes.md)
+ [DB Cluster Management API Error Messages and Codes](CommonErrors.md)
+ [Neptune Loader Error and Feed Messages](loader-message.md)