"You have requested more vCPU capacity", when launching G instance

Question

I have this error when launching g4dn.xlarge instance

You have requested more vCPU capacity than your current vCPU limit of 0 allows for the instance bucket that the specified instance type belongs to. Please visit http://aws.amazon.com/contact-us/ec2-request to request an adjustment to this limit.

However my Service Quota is like this below

All G and VT Spot Instance Requestss is 8

And I don't launch another G instance at the same time.

Where should I check?

Or is it relevant?(EC2 -> Limit, It shows Limits page deactivated)

(I can jump to the service quota page from the link in this page though)

Answer 1

You might be trying to reserve a "Running On-Demand G and VT instances" not spot instances. they are different.

Answer 2

Ensure you are requesting a spot instance when you configure the launch of your vm. There is a check box under the Advanced section of the launch wizard.