AWS SDK Version 3 for .NET
API Reference

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Updates the parameter values for stack instances for the specified accounts, within the specified regions. A stack instance refers to a stack in a specific account and region.

You can only update stack instances in regions and accounts where they already exist; to create additional stack instances, use CreateStackInstances.

During stack set updates, any parameters overridden for a stack instance are not updated, but retain their overridden value.

You can only update the parameter values that are specified in the stack set; to add or delete a parameter itself, use UpdateStackSet to update the stack set template. If you add a parameter to a template, before you can override the parameter value specified in the stack set you must first use UpdateStackSet to update all stack instances with the updated template and parameter value specified in the stack set. Once a stack instance has been updated with the new parameter, you can then override the parameter value using UpdateStackInstances.


For .NET Core and PCL this operation is only available in asynchronous form. Please refer to UpdateStackInstancesAsync.

Namespace: Amazon.CloudFormation
Assembly: AWSSDK.CloudFormation.dll
Version: 3.x.y.z


public abstract UpdateStackInstancesResponse UpdateStackInstances(
         UpdateStackInstancesRequest request
Type: Amazon.CloudFormation.Model.UpdateStackInstancesRequest

Container for the necessary parameters to execute the UpdateStackInstances service method.

Return Value
The response from the UpdateStackInstances service method, as returned by CloudFormation.


InvalidOperationException The specified operation isn't valid.
OperationIdAlreadyExistsException The specified operation ID already exists.
OperationInProgressException Another operation is currently in progress for this stack set. Only one operation can be performed for a stack set at a given time.
StackInstanceNotFoundException The specified stack instance doesn't exist.
StackSetNotFoundException The specified stack set doesn't exist.
StaleRequestException Another operation has been performed on this stack set since the specified operation was performed.

Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms

See Also