{"action":"created","issue":{"url":"https://api.github.com/repos/nextflow-io/nextflow/issues/37","labels_url":"https://api.github.com/repos/nextflow-io/nextflow/issues/37/labels{/name}","comments_url":"https://api.github.com/repos/nextflow-io/nextflow/issues/37/comments","events_url":"https://api.github.com/repos/nextflow-io/nextflow/issues/37/events","html_url":"https://github.com/nextflow-io/nextflow/issues/37","id":59794002,"number":37,"title":"Process with input from non-existing channel doesn't give warning","user":{"login":"sveint","id":5994867,"avatar_url":"https://avatars.githubusercontent.com/u/5994867?v=3","gravatar_id":"","url":"https://api.github.com/users/sveint","html_url":"https://github.com/sveint","followers_url":"https://api.github.com/users/sveint/followers","following_url":"https://api.github.com/users/sveint/following{/other_user}","gists_url":"https://api.github.com/users/sveint/gists{/gist_id}","starred_url":"https://api.github.com/users/sveint/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sveint/subscriptions","organizations_url":"https://api.github.com/users/sveint/orgs","repos_url":"https://api.github.com/users/sveint/repos","events_url":"https://api.github.com/users/sveint/events{/privacy}","received_events_url":"https://api.github.com/users/sveint/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":9,"created_at":"2015-03-04T12:57:38Z","updated_at":"2015-03-04T14:54:54Z","closed_at":"2015-03-04T14:47:57Z","body":"I just had a situation where I removed some code, removing one of the input channels for a process.\r\nWhat happened next is that my nextflow script would just sit there at the stage where it would normally launch said process, not giving any warning (that I can find) and not doing anything at all.\r\n\r\nI have experienced similar issues before, so I know I had to check my channels, but for a person new to Nextflow such a thing can be quite confusing, or even a dealbreaker.\r\n\r\nWhat I'm talking about is\r\n```\r\nprocess someProcess {\r\n   input:\r\n    file bam_file from bam_input\r\n    file vcf_file from vcf_input\r\n    file idx_file from idx_input  <-- channel doesn't exist anymore\r\n    \r\n    etc...\r\n\r\n```\r\n\r\nCan you confirm this behaviour? Is it possible to check consistency upon initialization and raise an exception in those cases?"},"comment":{"url":"https://api.github.com/repos/nextflow-io/nextflow/issues/comments/77171442","html_url":"https://github.com/nextflow-io/nextflow/issues/37#issuecomment-77171442","issue_url":"https://api.github.com/repos/nextflow-io/nextflow/issues/37","id":77171442,"user":{"login":"pditommaso","id":816968,"avatar_url":"https://avatars.githubusercontent.com/u/816968?v=3","gravatar_id":"","url":"https://api.github.com/users/pditommaso","html_url":"https://github.com/pditommaso","followers_url":"https://api.github.com/users/pditommaso/followers","following_url":"https://api.github.com/users/pditommaso/following{/other_user}","gists_url":"https://api.github.com/users/pditommaso/gists{/gist_id}","starred_url":"https://api.github.com/users/pditommaso/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/pditommaso/subscriptions","organizations_url":"https://api.github.com/users/pditommaso/orgs","repos_url":"https://api.github.com/users/pditommaso/repos","events_url":"https://api.github.com/users/pditommaso/events{/privacy}","received_events_url":"https://api.github.com/users/pditommaso/received_events","type":"User","site_admin":false},"created_at":"2015-03-04T14:54:54Z","updated_at":"2015-03-04T14:54:54Z","body":"You are welcome :)"}}