aocl list-devices : No devices attached for package:

When i run "aocl list-devices" command what i get is following output

-bash-4.2$ aocl list-devices
--------------------------------------------------------------------
Warning:
No devices attached for package:
<.....>/hld/board/a10_ref
--------------------------------------------------------------------

Seems the device is not added properly. What could be the reason.
Due to this I am not able to program my PAC.