I came across this error earlier today and spent the entire day troubleshooting it. So I wanted to share with you what my resolution was. I was getting this error on a MS cluster setup within my environment. I was working with a Systems Engineer; we were converting an existing MS cluster from using vmdks for the quorum and msdtc
I wanted to enable EVC in my lab environment, but found that I couldn’t because my VC was a VM within that same cluster. VC refused to enable it because there was still at least one VM powered on within the cluster. Duh. Of course, I broke out my handy-dandy do-it-all tool (yep, google) and proceeded to locate a workaround.