# Scale Up fails. Due to "ExactCapacity: 1"???

I have a AutoScalingGroup, ScalingPolicy, and an Alarm based on CPU > 50% for 10 minutes However, when I attempt to trigger the alarm, it doesn't scale up.

When I post to the ScaleUp URL, a new instance is spawned successfully.

The Scaling Group is defined as:

  scaling_group:
type: OS::Heat::AutoScalingGroup
properties:
min_size: 1
max_size: 5
resource:
type: app_server_template.yaml


The Scaling Policy is defined as:

  scaleup_policy:
type: OS::Heat::ScalingPolicy
properties: