Hi John,
The ClusterCopy tool is using Robocopy.exe in the job/task to tree copy the files among the compute nodes, you need to make sure Robocopy.exe and SMB protocol work fine on the nodes. As for firewall ports, make sure 137 (TCP/UDP) 138 (UDP) 139 (TCP) 445
(TCP) are opened.
Regards,
Yutong Sun