Use this consolidated error code index to navigate HTTP, AWS, Azure, and GCP failures from a single technical library. Each entry links to source-backed diagnosis, root-cause patterns, and production-focused remediation steps. Start broad, then drill into provider pages, operational categories, compare guides, or incident playbooks.
48 error codes available
81 error codes available
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AWS InvalidInstanceID.NotFound means the specified instance ID does not exist in the current scope, or it has not fully propagated yet.
AWS UnsupportedOperation means the requested EC2 operation is not supported for the selected instance, AMI, or resource configuration.
AWS EntityAlreadyExists means the request attempted to create an IAM resource that already exists (HTTP 409).
AWS MalformedPolicyDocument means the IAM policy document is malformed and includes syntax or structural errors (HTTP 400).
AWS PolicyNotAttachable means the policy cannot be attached because service-role policies are attachable only to their service-linked roles (HTTP 400).
AWS LimitExceeded means the IAM request exceeds current account limits for identity objects or attachment dimensions (HTTP 409).
CloudFront returns `InvalidArgument` when one or more request parameters are invalid, so the distribution operation is rejected with HTTP 400.
AWS DistributionAlreadyExists means the CallerReference is already associated with another CloudFront distribution request (HTTP 409).
AWS NoSuchDistribution means the specified CloudFront distribution does not exist in the current account scope (HTTP 404).
CloudFront returns `InvalidOrigin` when the specified Amazon S3 origin does not refer to a valid S3 bucket in the distribution request (HTTP 400).
AWS TooManyDistributions means processing the CloudFront request would exceed the account limit for distributions (HTTP 400).
AWS InvalidParameterCombination means parameters that must not be used together were used together, or a required companion parameter is missing.
AWS InvalidSnapshot.NotFound means the specified EBS snapshot does not exist for the account and region context of the request.
Amazon EC2 returns `VolumeInUse` when the specified EBS volume is attached to an instance and not in an `available` state for the requested operation.
AWS DeleteConflict means the IAM resource cannot be deleted because subordinate entities are still attached (HTTP 409).