What UGS version are you running? I got errors with 1.0.9 but, 2.0.0 would start. I was actually able to do a carve today but, on the second carve it just stopped have way through and just sat there.
I rebooted everything then, rezeroed and started again. The carve stopped a second time in a different spot. Not sure what is up with that.
I guess I will have to go back to the Xenial PUP linux computer, at least it worked on that machine. Are you running the UGS on a full install of Rasbian?
This is the error I get when I try to run 1.0.9