Exception Occured when opening job - Device Attached to System is not functioning properly

Having a problem. Trying to open a job (my first with the demo version of Cortex (DIT Lic), and it pops up with :

Exception Occurred when opening job - Device Attached to System is not functioning properly

Everything seems to be working fine. am I missing something?

Thanks
Mike

Solved my own issue.

Mac formatted RAID.