| Enum | Description | 
|---|---|
| ExecutionStatus | |
| HistoryEventType | |
| StateMachineStatus | 
| Exception | Description | 
|---|---|
| ActivityDoesNotExistException | 
 The specified activity does not exist. | 
| ActivityLimitExceededException | 
 The maximum number of activities has been reached. | 
| ActivityWorkerLimitExceededException | 
 The maximum number of workers concurrently polling for activity tasks has been reached. | 
| AWSStepFunctionsException | Base exception for all service exceptions thrown by AWS Step Functions | 
| ExecutionAlreadyExistsException | 
 An execution with the same name already exists. | 
| ExecutionDoesNotExistException | 
 The specified execution does not exist. | 
| ExecutionLimitExceededException | 
 The maximum number of running executions has been reached. | 
| InvalidArnException | 
 The provided Amazon Resource Name (ARN) is invalid. | 
| InvalidDefinitionException | 
 The provided Amazon States Language definition is invalid. | 
| InvalidExecutionInputException | 
 The provided JSON input data is invalid. | 
| InvalidNameException | 
 The provided name is invalid. | 
| InvalidOutputException | 
 The provided JSON output data is invalid. | 
| InvalidTokenException | 
 The provided token is invalid. | 
| StateMachineAlreadyExistsException | 
 A state machine with the same name but a different definition or role ARN already exists. | 
| StateMachineDeletingException | 
 The specified state machine is being deleted. | 
| StateMachineDoesNotExistException | 
 The specified state machine does not exist. | 
| StateMachineLimitExceededException | 
 The maximum number of state machines has been reached. | 
| TaskDoesNotExistException | |
| TaskTimedOutException | 
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