first - Which version is you vcenter ?
Post here a logs of vcenter %AllUsersProfile%\Application Data\VMware\VMware VirtualCenter\.
you just try check if this problem not is of your VI Client, try same operation in other computer
*Please, don't forget the awarding points for "helpful" and/or "correct" answers.
*Por favor, não esqueça de atribuir os pontos se a resposta foi útil ou resolveu o problema.*
Thank you/Obrigado
