Error deploying virtual machine: Could not create domain from /var/lib/one//datastores/0/16/deployment.0

hi there,

i have installed opennebula 5.2 .i am getting an error while running a vm with ubutnu 14.04 iso image template log of vm is as follows

Wed Nov 23 05:18:35 2016 [Z0][VM][I]: New state is ACTIVE
Wed Nov 23 05:18:36 2016 [Z0][VM][I]: New LCM state is PROLOG
Wed Nov 23 05:19:45 2016 [Z0][VM][I]: New LCM state is BOOT
Wed Nov 23 05:19:45 2016 [Z0][VMM][I]: Generating deployment file: /var/lib/one/vms/16/deployment.0
Wed Nov 23 05:19:47 2016 [Z0][VMM][I]: Successfully execute transfer manager driver operation: tm_context.
Wed Nov 23 05:19:47 2016 [Z0][VMM][I]: ExitCode: 0
Wed Nov 23 05:19:47 2016 [Z0][VMM][I]: Successfully execute network driver operation: pre.
Wed Nov 23 05:19:47 2016 [Z0][VMM][I]: Command execution fail: cat << EOT | /var/tmp/one/vmm/kvm/deploy ‘/var/lib/one//datastores/0/16/deployment.0’ ‘192.168.0.101’ 16 192.168.0.101
Wed Nov 23 05:19:47 2016 [Z0][VMM][I]: error: Failed to create domain from /var/lib/one//datastores/0/16/deployment.0
Wed Nov 23 05:19:47 2016 [Z0][VMM][I]: error: Unable to add port one-16-0 to OVS bridge virbr0: Operation not permitted
Wed Nov 23 05:19:47 2016 [Z0][VMM][E]: Could not create domain from /var/lib/one//datastores/0/16/deployment.0
Wed Nov 23 05:19:47 2016 [Z0][VMM][I]: ExitCode: 255
Wed Nov 23 05:19:47 2016 [Z0][VMM][I]: Failed to execute virtualization driver operation: deploy.
Wed Nov 23 05:19:47 2016 [Z0][VMM][E]: Error deploying virtual machine: Could not create domain from /var/lib/one//datastores/0/16/deployment.0
Wed Nov 23 05:19:47 2016 [Z0][VM][I]: New LCM state is BOOT_FAILURE

Please help me to solve this
thank you

You might want to to check if the oneadmin user is allowed to read any file in datastore 0, because of this error:
Command execution fail: cat << EOT | /var/tmp/one/vmm/kvm/deploy ‘/var/lib/one//datastores/0/16/deployment.0’ ‘192.168.0.101’ 16 192.168.0.101
Another thing to look at if the oneadmin user can control OVS bridges without being asked for a password.

my datastore 0 is of type SYSTEM and is not showing CAPACITY and its LIMIT is 0 MBs
Let me know if this is an issue for earlier errors.