  [Errno 20] Not a directory - Error while launching the Cluster

Steps followed
1. Access key ID and Secret Access Key generated for AWS
2. Environment variable set
3. Git clone done
   4.

```
training-scripts]# ./spark-ec2 -i /home/chai/Downloads/td-key-pair-virgina.pem -k td-key-pair-virginio --copy launch amplab-training
[Errno 20] Not a directory

```

It is unable to find the pem file despite giving it the right directory path for the same.
