I reinstalled the hosts
step:
1) create new host > I selected srv-02
2) host created
1) create new host > I selected srv-03
2) host created
and noticed two things :
1) I tried now, to remove the remaining VMs , but the error was the same : Cannot remove VM. VM is attached to a VM-Pool.
2) I can run theses VMs . That is, I can remove the host and reinsert again without VM problems.
2.1) And another detail: these VMs are thin/dependent.
All others VMs that I was able to remove was the type clone/independent.
What happens with this thin type provisioning?