This is the human-readable error text tied to fsmRmtInvErrCode for this specific DVS deletion attempt. For this task, it gives the literal vCenter-supplied reason the deletion failed, typically the fastest way to know whether to fix a permissions issue or first migrate VMs off the DVS before retrying. A message such as 'The object or item referred to could not be found' would indicate the target DVS for this specific task no longer exists in vCenter, so this deletion task can safely be considered moot.