{"action":"created","issue":{"url":"https://api.github.com/repos/Mouse-Imaging-Centre/RMINC/issues/35","repository_url":"https://api.github.com/repos/Mouse-Imaging-Centre/RMINC","labels_url":"https://api.github.com/repos/Mouse-Imaging-Centre/RMINC/issues/35/labels{/name}","comments_url":"https://api.github.com/repos/Mouse-Imaging-Centre/RMINC/issues/35/comments","events_url":"https://api.github.com/repos/Mouse-Imaging-Centre/RMINC/issues/35/events","html_url":"https://github.com/Mouse-Imaging-Centre/RMINC/issues/35","id":49954556,"number":35,"title":"Downdated VtV is not positive definite error causes mincLmer to crash without output","user":{"login":"vfonov","id":628822,"avatar_url":"https://avatars.githubusercontent.com/u/628822?v=3","gravatar_id":"","url":"https://api.github.com/users/vfonov","html_url":"https://github.com/vfonov","followers_url":"https://api.github.com/users/vfonov/followers","following_url":"https://api.github.com/users/vfonov/following{/other_user}","gists_url":"https://api.github.com/users/vfonov/gists{/gist_id}","starred_url":"https://api.github.com/users/vfonov/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/vfonov/subscriptions","organizations_url":"https://api.github.com/users/vfonov/orgs","repos_url":"https://api.github.com/users/vfonov/repos","events_url":"https://api.github.com/users/vfonov/events{/privacy}","received_events_url":"https://api.github.com/users/vfonov/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2014-11-24T23:00:33Z","updated_at":"2016-05-03T21:00:11Z","closed_at":null,"body":"Running simple voxelwise mixed effect fitting:\r\n\r\nmodel<-mincLmer(log_det~cohort+(1|subj),data=dbm,mask='model_nl_c/avg.016_mask_lr.mnc',parallel=c(\"snowfall\", 4)) \r\n\r\nworks for a while and then prints:\r\n\r\nError in checkForRemoteErrors(val) : \r\n  4 nodes produced errors; first error: Downdated VtV is not positive definite\r\n\r\nand produces no output"},"comment":{"url":"https://api.github.com/repos/Mouse-Imaging-Centre/RMINC/issues/comments/216663052","html_url":"https://github.com/Mouse-Imaging-Centre/RMINC/issues/35#issuecomment-216663052","issue_url":"https://api.github.com/repos/Mouse-Imaging-Centre/RMINC/issues/35","id":216663052,"user":{"login":"cfhammill","id":7467038,"avatar_url":"https://avatars.githubusercontent.com/u/7467038?v=3","gravatar_id":"","url":"https://api.github.com/users/cfhammill","html_url":"https://github.com/cfhammill","followers_url":"https://api.github.com/users/cfhammill/followers","following_url":"https://api.github.com/users/cfhammill/following{/other_user}","gists_url":"https://api.github.com/users/cfhammill/gists{/gist_id}","starred_url":"https://api.github.com/users/cfhammill/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cfhammill/subscriptions","organizations_url":"https://api.github.com/users/cfhammill/orgs","repos_url":"https://api.github.com/users/cfhammill/repos","events_url":"https://api.github.com/users/cfhammill/events{/privacy}","received_events_url":"https://api.github.com/users/cfhammill/received_events","type":"User","site_admin":false},"created_at":"2016-05-03T21:00:11Z","updated_at":"2016-05-03T21:00:11Z","body":"I have added a \"safely\" boolean argument to `mincLmer`, this will downgrade warnings to errors in the lmer optimization code returning NA for that voxel. "}}