http://developers.de/blogs/damir_dobric/archive/2010/08/28/appfabric-cancel-command-failure.aspxIf you see this error in AppFabric dashboard you might be suprised, because the error is cause by some workflow activity, which is not a part of your workflow. (1) 'Cancel' command failure: The message could not be dispatched because the serviceenCommunityServer 2008 SP1 (Build: 30619.63)