Yeah, it’s very annoying to have alltogether cron logs with the rest of the system messages, right? I don’t know why Ubuntu took that policy, but in busy servers it can be hard to mantain such a log. I think they aimed for simplicity, since a good configured cron should not send many log...

So if you are having any message like the ones above, you probably need to do some of the following: A general system error occurred: Internal Error / Power up of guest stops at 95% / Can’t boot after reboot / Cannot connect to virtual machine / Timeout First: Check your log at /var/log/vmware/hostd.log...