{"action":"closed","issue":{"url":"https://api.github.com/repos/bashtage/arch/issues/123","repository_url":"https://api.github.com/repos/bashtage/arch","labels_url":"https://api.github.com/repos/bashtage/arch/issues/123/labels{/name}","comments_url":"https://api.github.com/repos/bashtage/arch/issues/123/comments","events_url":"https://api.github.com/repos/bashtage/arch/issues/123/events","html_url":"https://github.com/bashtage/arch/issues/123","id":170377279,"number":123,"title":"Multithreading fit ARX causing The optimizer returned code 9","user":{"login":"gaussleescorpio","id":17249981,"avatar_url":"https://avatars.githubusercontent.com/u/17249981?v=3","gravatar_id":"","url":"https://api.github.com/users/gaussleescorpio","html_url":"https://github.com/gaussleescorpio","followers_url":"https://api.github.com/users/gaussleescorpio/followers","following_url":"https://api.github.com/users/gaussleescorpio/following{/other_user}","gists_url":"https://api.github.com/users/gaussleescorpio/gists{/gist_id}","starred_url":"https://api.github.com/users/gaussleescorpio/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gaussleescorpio/subscriptions","organizations_url":"https://api.github.com/users/gaussleescorpio/orgs","repos_url":"https://api.github.com/users/gaussleescorpio/repos","events_url":"https://api.github.com/users/gaussleescorpio/events{/privacy}","received_events_url":"https://api.github.com/users/gaussleescorpio/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":16,"created_at":"2016-08-10T09:53:53Z","updated_at":"2016-12-22T10:27:01Z","closed_at":"2016-12-22T10:27:01Z","body":"Hi, I recently start to use your library for modelling time series. It works perfectly fine under single thread. But if I use ARX model and fit a lot of them in a multithreading task. Then I randomly got either\n\n`The optimizer returned code 9. The message is:\nIteration limit exceeded\nSee scipy.optimize.fmin_slsqp for code meaning.\n\n  ConvergenceWarning)`\n\nor `The optimizer returned code 5` problems. So I get nan for the final results. Is it normal? Is ARX thread safe?\n"}}
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