I have recently upgraded my vCenter from 6.0 -> 6.5u1, and I'm not looking to upgrade my ESXi 6.0u3 installs to 6.5u1. My first attempt was to use one-click hypervisor upgrade, and I was able to uploading the ISO and MD5 checksum, but the pre-upgrade check errors out pretty quickly with a fairly generic error message saying "unable to determine version of bundle." Did a few re-download and re-upload attempts to verify my file integrity but the error persisted. I then tried to do the upgrade old-school style using VUM which is conveniently baked into my VCSA as of 6.5, and I got another generic error message inside of update manager, "The upgrade contains the following set of conflicting VIBs:" with nothing but blank space following the colon. Typically I would have expected to see an individual VIB called out in list form, but there is just nothing there. I am fully patched to current using Nutanix LCM, so I suspect it is probably one of the LSI HBA updates that LCM has slipped in - has anybody else run across a similar problem? Did some searching around the VMware community forums and I haven't seen any "blank" incompatible VIB errors so I have a gut feeling that it is a symptom/something related to specific Nutanix LCM updates that we have performed.