{"action":"opened","issue":{"url":"https://api.github.com/repos/knime-ip/knip/issues/315","repository_url":"https://api.github.com/repos/knime-ip/knip","labels_url":"https://api.github.com/repos/knime-ip/knip/issues/315/labels{/name}","comments_url":"https://api.github.com/repos/knime-ip/knip/issues/315/comments","events_url":"https://api.github.com/repos/knime-ip/knip/issues/315/events","html_url":"https://github.com/knime-ip/knip/issues/315","id":139572165,"number":315,"title":"Compose Labeling throws RuntimeException","user":{"login":"imagejan","id":2033938,"avatar_url":"https://avatars.githubusercontent.com/u/2033938?v=3","gravatar_id":"","url":"https://api.github.com/users/imagejan","html_url":"https://github.com/imagejan","followers_url":"https://api.github.com/users/imagejan/followers","following_url":"https://api.github.com/users/imagejan/following{/other_user}","gists_url":"https://api.github.com/users/imagejan/gists{/gist_id}","starred_url":"https://api.github.com/users/imagejan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/imagejan/subscriptions","organizations_url":"https://api.github.com/users/imagejan/orgs","repos_url":"https://api.github.com/users/imagejan/repos","events_url":"https://api.github.com/users/imagejan/events{/privacy}","received_events_url":"https://api.github.com/users/imagejan/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-03-09T13:06:08Z","updated_at":"2016-03-09T13:06:08Z","closed_at":null,"body":"When using the GroupBy node with Compose Labeling (using the nightly builds), I get the following exception:\r\n\r\n```\r\nERROR GroupBy              0:166:35   Execute failed: java.lang.RuntimeException: java.lang.ClassCastException: net.imglib2.img.array.ArrayImg cannot be cast to org.knime.knip.base.data.img.ImgPlusCellMetadata\r\n```\r\n\r\nThese are my settings:\r\n\r\n![composelabeling](https://cloud.githubusercontent.com/assets/2033938/13636071/03c67d7c-e600-11e5-953f-f1c4a01b9712.png)\r\n"}}