Is anyone else having issues publishing at the moment? Appears to be a service disruption with only the following error message--
Sending to Publishing...
...Uploading Service Definition
Failure! -- ERROR 999999: Something unexpected caused the tool to fail. Contact Esri Technical Support (http://esriurl.com/support) to Report a Bug, and refer to the error help for potential solutions or workarounds.
Failed to execute (UploadServiceDefinition).