A Specified Parameter Was Not Correct. Spec.Identity.UserData.ComputerName Posted on by Webmaster IT Support Forum › Forums › Virtualization › VMware › ESXi › VMs › A Specified Parameter Was Not Correct. Spec.Identity.UserData.ComputerName Tagged: Computer Name This topic contains 0 replies, has 1 voice, and was last updated by Webmaster 2 years, 1 month ago. Author Posts August 7, 2015 at 8:24 am #1309 WebmasterKeymaster When you clone a virtual machine from a template and customise it, you get this error from VMware: Clone Virtual Machine A specified parameter was not correct. spec.identity.userData.computerName Obviously the spec.identity.userData.computerName parameter not being correct refers to an issue with the computerName. To fix this: Ensure that there are no underscores in the computerName Ensure that the computerName is a valid computer name according to Windows (isn’t longer than 15 characters and doesn’t contain invalid characters) Ensure that the computerName doesn’t contain only numbers After correcting the computerName, you should then be able to clone the VM from a template without the spec.identity.userData.computerName error. Author Posts You must be logged in to reply to this topic.