# CancelCapacityReservationFleets
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Cancels one or more Capacity Reservation Fleets. When you cancel a Capacity Reservation Fleet, the following happens:
+ The Capacity Reservation Fleet's status changes to `cancelled`.
+ The individual Capacity Reservations in the Fleet are cancelled. Instances running in the Capacity Reservations at the time of cancelling the Fleet continue to run in shared capacity.
+ The Fleet stops creating new Capacity Reservations.

## Request Parameters
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The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see [Common Query Parameters](CommonParameters.md).

 **CapacityReservationFleetId.N**   
The IDs of the Capacity Reservation Fleets to cancel.  
Type: Array of strings  
Required: Yes

 **DryRun**   
Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is `DryRunOperation`. Otherwise, it is `UnauthorizedOperation`.  
Type: Boolean  
Required: No

## Response Elements
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The following elements are returned by the service.

 **failedFleetCancellationSet**   
Information about the Capacity Reservation Fleets that could not be cancelled.  
Type: Array of [FailedCapacityReservationFleetCancellationResult](API_FailedCapacityReservationFleetCancellationResult.md) objects

 **requestId**   
The ID of the request.  
Type: String

 **successfulFleetCancellationSet**   
Information about the Capacity Reservation Fleets that were successfully cancelled.  
Type: Array of [CapacityReservationFleetCancellationState](API_CapacityReservationFleetCancellationState.md) objects

## Errors
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For information about the errors that are common to all actions, see [Common client error codes](errors-overview.md#CommonErrors).

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/ec2-2016-11-15/CancelCapacityReservationFleets) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/ec2-2016-11-15/CancelCapacityReservationFleets) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/ec2-2016-11-15/CancelCapacityReservationFleets) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/ec2-2016-11-15/CancelCapacityReservationFleets) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/CancelCapacityReservationFleets) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/ec2-2016-11-15/CancelCapacityReservationFleets) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/ec2-2016-11-15/CancelCapacityReservationFleets) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/ec2-2016-11-15/CancelCapacityReservationFleets) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/ec2-2016-11-15/CancelCapacityReservationFleets) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/CancelCapacityReservationFleets)