{"action":"opened","issue":{"url":"https://api.github.com/repos/BVLC/caffe/issues/2431","labels_url":"https://api.github.com/repos/BVLC/caffe/issues/2431/labels{/name}","comments_url":"https://api.github.com/repos/BVLC/caffe/issues/2431/comments","events_url":"https://api.github.com/repos/BVLC/caffe/issues/2431/events","html_url":"https://github.com/BVLC/caffe/issues/2431","id":74207865,"number":2431,"title":"run mnist in examples failed  ","user":{"login":"donalwilson","id":11718733,"avatar_url":"https://avatars.githubusercontent.com/u/11718733?v=3","gravatar_id":"","url":"https://api.github.com/users/donalwilson","html_url":"https://github.com/donalwilson","followers_url":"https://api.github.com/users/donalwilson/followers","following_url":"https://api.github.com/users/donalwilson/following{/other_user}","gists_url":"https://api.github.com/users/donalwilson/gists{/gist_id}","starred_url":"https://api.github.com/users/donalwilson/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/donalwilson/subscriptions","organizations_url":"https://api.github.com/users/donalwilson/orgs","repos_url":"https://api.github.com/users/donalwilson/repos","events_url":"https://api.github.com/users/donalwilson/events{/privacy}","received_events_url":"https://api.github.com/users/donalwilson/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-05-08T03:05:48Z","updated_at":"2015-05-08T03:05:48Z","closed_at":null,"body":"I'm using Ubuntu 14.04.2, and all make are passed. but when I testing caffe on mnist in examples. An error occurs: \r\nF0508 11:00:05.430325  8582 db.hpp:109] Check failed: mdb_status == 0 (2 vs. 0) No such file or directory\r\n*** Check failure stack trace: ***\r\n    @     0x7fa547ada9fd  google::LogMessage::Fail()\r\n    @     0x7fa547adc89d  google::LogMessage::SendToLog()\r\n    @     0x7fa547ada5ec  google::LogMessage::Flush()\r\n    @     0x7fa547add1be  google::LogMessageFatal::~LogMessageFatal()\r\n    @     0x7fa547ecebe1  caffe::db::LMDB::Open()\r\n    @     0x7fa547ec3df4  caffe::DataLayer<>::DataLayerSetUp()\r\n    @     0x7fa547ec85ba  caffe::BaseDataLayer<>::LayerSetUp()\r\n    @     0x7fa547ec8739  caffe::BasePrefetchingDataLayer<>::LayerSetUp()\r\n    @     0x7fa547f1bdf1  caffe::Net<>::Init()\r\n    @     0x7fa547f1e2b2  caffe::Net<>::Net()\r\n    @     0x7fa547efdc35  caffe::Solver<>::InitTrainNet()\r\n    @     0x7fa547efe157  caffe::Solver<>::Init()\r\n    @     0x7fa547efe545  caffe::Solver<>::Solver()\r\n    @           0x40d636  caffe::SGDSolver<>::SGDSolver()\r\n    @           0x40d8f8  caffe::GetSolver<>()\r\n    @           0x407223  train()\r\n    @           0x4052d8  main\r\n    @     0x7fa547211ec5  (unknown)\r\n    @           0x4056b2  (unknown)\r\nAborted (core dumped)\r\n"}}