Hello everyone,
Sorry to be a bother again, but I was following this little step Import VM to import my current VMs into OpenNebula and got the following error
Fri Sep 18 10:07:41 2015 : Error copying image in the datastore: Error copying /VMs/WebServer.img to /var/lib/one//datastores/1/790ad3e61adcd4b20a6b3201c617f894
note: the double slashes in the url before datastores
I think i have this figured out but still would like to know where the // are coming from. Can someone help me with it please?
I wuld like to bet on /var/lib/one/config 
KindRegards
Anton Todorov
You can’t add image from /var/lib/one directory to datastore, that directory is restricted directory and opennebula don’t allow you to use from it and it’s subdirectories.
Move your image to another directory and test again. 
And having // is not an issue for Linux.