# Amazon EMR cluster error: EC2 is out of capacity
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An *EC2 is out of capacity for *InstanceType** error occurs when you attempt to create a cluster, or add instances to a cluster, in an Availability Zone which has no more of the specified EC2 instance type. The subnet that you select for a cluster determines the Availability Zone.

To create a cluster, do one of the following:
+ Specify a different instance type with similar capabilities
+ Create the cluster in a different Region
+ Select a subnet in an Availability Zone where the instance type you want might be available.

To add instances to a running cluster, do one of the following:
+ Modify instance group configurations or instance fleet configurations to add available instance types with similar capabilities. For a list of supported instance types, see [Supported instance types with Amazon EMR](emr-supported-instance-types.md). To compare capabilities of EC2 instance types, see [Amazon EC2 instance types](https://aws.amazon.com/ec2/instance-types/). 
+ Terminate the cluster and recreate it in a Region and Availability Zone where the instance type is available.