Inaccessible host: `states.eu_west_1.amazonaws.com'.

Question

Hi,  
I'm trying to start a step function in Lambda in a VPC through a VPC endpoint with Node.js by giving an ARN (as https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/StepFunctions.html#startExecution-property). I get an error message:  
  
Inaccessible host: `states.eu_west_1.amazonaws.com'. This service may not be available in the `eu_west_1' region.  
  
For some reason it uses underscores in the address. If I look for the hostname in a EC2 instance, it exists with dashes:  
  
~$ nslookup states.eu_west_1.amazonaws.com  
Server:         127.0.0.53  
Address:        127.0.0.53#53  
  
** server can't find states.eu_west_1.amazonaws.com: NXDOMAIN  
  
~$ nslookup states.eu-west-1.amazonaws.com  
Server:         127.0.0.53  
Address:        127.0.0.53#53  
  
Non-authoritative answer:  
Name:   states.eu-west-1.amazonaws.com  
Address: 10.0.3.98  
Name:   states.eu-west-1.amazonaws.com  
Address: 10.0.1.27  
  
There is no such hostname in my VPC. Help?

Answer

My bad, I had accidentally marked the region:   
  
const stepFunctions = new AWS.StepFunctions({  
    region: 'eu_west_1'  
});  
  
Changing the region to  'eu-west-1' solved the problem. &#128563;

Inaccessible host: `states.eu_west_1.amazonaws.com'.

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