I have a VNXe3200 with System Software version 3.1.14.10199487.  We have an ESXi host that has failed, so I'd like to remove it from the list of hosts in Unisphere.

In Unisphere, I navigate to Access, Hosts, then check the box in front of the host I wish to delete and click the delete icon.

I get an error box stating "job.hostservice.task.DeleteHost.......................Failed".  I can't find any other useful information on why the host can't be deleted.

Any thoughts on why the host can't be deleted?

The host hasn't actually completely failed, but a heat sink detached from the system board, so the host shuts down within 10 minutes of powering up due to overheating.  So, I was able to remove all iSCSI connections on the host and restart it, so that none of the VNXe3200 LUNs and associated datastores are now present on the failed server.