When using a non-admin user account for vSphere 5, created according to vRanger 5.4/5.5 Deployment Guide (pages 25-28), the replication/backup job will fail with "3201" error (cannot open disks on source side). Switching to user account to Administrator role resolves the issue.
vRanger 6.0- Installation & Upgrade Guide
vSphere 4.x
-Before You Install | Configuring vCenter Permissions | vSphere 4.x
vSphere 5.x
-Before You Install | Configuring vCenter Permissions | vSphere 5
