Error creating EC2 instance

Question

I'm trying to create a R4.xl EC2 instance and getting the following error:

EBS-optimized instances are not supported for your requested configuration. Please check the documentation for supported configurations.

When trying to create the exact same instance for R3.xl, it well went through fine.

from what i know the only difference between them is that R4 can work only on EBS, and indeed in R4 config, it is marked to work with EBS:

any idea what can be wrong in here?

Answer 1

For me, it was that the instance type I was choosing to use (m3.medium) wasn't available in the region I was using (ca-central-1). Kind of a cryptic message.