On Unix, this really is an NFS issue and not Oracle or eHealth's issue. Some of the caching / refreshing of handles that NFS does causes RMAN to hang. Binary saves are not supported over NFS. However, you can do binary saves over NFS and it may work most of the time. In situations when a hang does occur, you may have to reboot the server / client machine to resolve the issue.
For Windows, remotely mounted shared drives are not supported for database saves.
Release: LHBASC99000-6.2-eHealth-Live Health Upgrade Elements