{"action":"opened","issue":{"url":"https://api.github.com/repos/igraph/python-igraph/issues/198","repository_url":"https://api.github.com/repos/igraph/python-igraph","labels_url":"https://api.github.com/repos/igraph/python-igraph/issues/198/labels{/name}","comments_url":"https://api.github.com/repos/igraph/python-igraph/issues/198/comments","events_url":"https://api.github.com/repos/igraph/python-igraph/issues/198/events","html_url":"https://github.com/igraph/python-igraph/issues/198","id":376145021,"node_id":"MDU6SXNzdWUzNzYxNDUwMjE=","number":198,"title":"Error while running community_optimal_modularity()","user":{"login":"jfoppe","id":13354614,"node_id":"MDQ6VXNlcjEzMzU0NjE0","avatar_url":"https://avatars3.githubusercontent.com/u/13354614?v=4","gravatar_id":"","url":"https://api.github.com/users/jfoppe","html_url":"https://github.com/jfoppe","followers_url":"https://api.github.com/users/jfoppe/followers","following_url":"https://api.github.com/users/jfoppe/following{/other_user}","gists_url":"https://api.github.com/users/jfoppe/gists{/gist_id}","starred_url":"https://api.github.com/users/jfoppe/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jfoppe/subscriptions","organizations_url":"https://api.github.com/users/jfoppe/orgs","repos_url":"https://api.github.com/users/jfoppe/repos","events_url":"https://api.github.com/users/jfoppe/events{/privacy}","received_events_url":"https://api.github.com/users/jfoppe/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-10-31T20:22:58Z","updated_at":"2018-10-31T20:22:58Z","closed_at":null,"author_association":"NONE","body":"Hello,\r\ni try to run a community detection with python-igraph and the optimal_modularity method but it throws an error\r\nmy code:\r\n`import igraph as ig`\r\n`g = ig.read(\"arabidopsis.graphml\")`\r\n`clustered = g.community_optimal_modularity()`\r\n`print(clustered)`\r\n\r\nError:\r\n`glp_add_cols: ncs = 564060078; too many columns`\r\n`Error detected in file api/prob1.c at line 365`\r\n`Process finished with exit code 134 (interrupted by signal 6: SIGABRT)`\r\n\r\nthe problem must be in line 3, because other methods (like community_walktrap()) work perfect\r\n\r\n\r\n"}}
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