{"action":"created","issue":{"url":"https://api.github.com/repos/underworldcode/underworld2/issues/22","labels_url":"https://api.github.com/repos/underworldcode/underworld2/issues/22/labels{/name}","comments_url":"https://api.github.com/repos/underworldcode/underworld2/issues/22/comments","events_url":"https://api.github.com/repos/underworldcode/underworld2/issues/22/events","html_url":"https://github.com/underworldcode/underworld2/issues/22","id":112796381,"number":22,"title":"underworld crash ","user":{"login":"QwZhang","id":12026068,"avatar_url":"https://avatars.githubusercontent.com/u/12026068?v=3","gravatar_id":"","url":"https://api.github.com/users/QwZhang","html_url":"https://github.com/QwZhang","followers_url":"https://api.github.com/users/QwZhang/followers","following_url":"https://api.github.com/users/QwZhang/following{/other_user}","gists_url":"https://api.github.com/users/QwZhang/gists{/gist_id}","starred_url":"https://api.github.com/users/QwZhang/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/QwZhang/subscriptions","organizations_url":"https://api.github.com/users/QwZhang/orgs","repos_url":"https://api.github.com/users/QwZhang/repos","events_url":"https://api.github.com/users/QwZhang/events{/privacy}","received_events_url":"https://api.github.com/users/QwZhang/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"mirkovelic","id":7285884,"avatar_url":"https://avatars.githubusercontent.com/u/7285884?v=3","gravatar_id":"","url":"https://api.github.com/users/mirkovelic","html_url":"https://github.com/mirkovelic","followers_url":"https://api.github.com/users/mirkovelic/followers","following_url":"https://api.github.com/users/mirkovelic/following{/other_user}","gists_url":"https://api.github.com/users/mirkovelic/gists{/gist_id}","starred_url":"https://api.github.com/users/mirkovelic/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mirkovelic/subscriptions","organizations_url":"https://api.github.com/users/mirkovelic/orgs","repos_url":"https://api.github.com/users/mirkovelic/repos","events_url":"https://api.github.com/users/mirkovelic/events{/privacy}","received_events_url":"https://api.github.com/users/mirkovelic/received_events","type":"User","site_admin":false},"milestone":null,"comments":12,"created_at":"2015-10-22T12:53:37Z","updated_at":"2015-10-27T01:50:17Z","closed_at":null,"body":"Hi all,\r\nI recently encounter a problem bothering me for two weeks. When I try to run **underworld ([the old v 1.7.1](http://underworldproject.org/downloads.html))**, it crashes frequently and output logs containing error massages like:\r\n```bash\r\n...\r\nTimeStep = 7929, Start time = 5.67414e+15, prev timeStep dt = 2.80334e+11\r\nLinear solver (stokesEqn-execute) \r\nSummary:\r\n  Uzawa its. = 0001 , Uzawa residual = 2.8222473808963e-04\r\n  |G^T u|/|u|               = 8.68710196e+03\r\n  |f - K u - G p|/|f|       = 1.90102889e-06\r\n  |f - K u - G p|_w/|f|_w   = 1.00000000e+00\r\n  |u|_{\\infty} = 2.98448575e-08 , u_rms = 6.40212771e-10\r\n  |p|_{\\infty} = 2.87173354e+10 , p_rms = 1.45071303e+10\r\n  min/max(u) = -2.18850636e-08 [142] / 2.98448575e-08 [169]\r\n  min/max(p) = -3.42226374e+09 [3777] / 2.87173354e+10 [63]\r\n  \\sum_i p_i = 4.64813204e+13 \r\nLinear solver (stokesEqn-execute), solution time 2.689152e-01 (secs)\r\nTime Integration\r\n\t       EP:        SwarmAdvector_AdvectionSetup -    0.0000 [min] /    0.0002 [max] (secs)\r\n\t2nd order:               materialSwarmAdvector -    0.0037 [min] /    0.0055 [max] (secs)\r\n\t       EP:       SwarmAdvector_AdvectionFinish -    0.0020 (secs)\r\n\t       EP:          MaterialPointsSwarm_Update -    0.0008 (secs)\r\nIn func WeightsCalculator_CalculateAll(): for swarm \"picIntegrationPoints\"\r\n5: Something went horribly wrong in _PCDVC_Calculate2D: Problem has an under resolved cell (Cell Id = 10), check or tune your population control parameters\r\nUnderworld: StGermain/Base/IO/src/Journal.c:547: Journal_Firewall: Assertion `expression' failed.\r\n...\r\n```\r\nI highlight the error massage here:\r\n**Something went horribly wrong in _PCDVC_Calculate2D: Problem has an under resolved cell (Cell Id = 10), check or tune your population control parameters\r\nUnderworld: StGermain/Base/IO/src/Journal.c:547: Journal_Firewall: Assertion `expression' failed.**\r\nIt seems that the same issue have been noticed by other people in the [former forum of underworld] (https://www.google.com.hk/search?q=Underworld:+StGermain/Base/IO/src/Journal.c:547:+Journal_Firewall:+Assertion+%60expression%27+failed.&num=100&newwindow=1&safe=strict&biw=1680&bih=915&source=lnt&tbs=qdr:y&sa=X&ved=0CBQQpwVqFQoTCOXY_Y-E1sgCFQH-LAod1y8I8A) but it is not accessible any more. Because of my lack of extra time for learning the new underworld 2, which I'm not familar with, I will not shift my attention from the old code to it immediately.\r\nAnyone ever had the same problem? Any hint will be appreciated!"},"comment":{"url":"https://api.github.com/repos/underworldcode/underworld2/issues/comments/151341135","html_url":"https://github.com/underworldcode/underworld2/issues/22#issuecomment-151341135","issue_url":"https://api.github.com/repos/underworldcode/underworld2/issues/22","id":151341135,"user":{"login":"julesghub","id":13825704,"avatar_url":"https://avatars.githubusercontent.com/u/13825704?v=3","gravatar_id":"","url":"https://api.github.com/users/julesghub","html_url":"https://github.com/julesghub","followers_url":"https://api.github.com/users/julesghub/followers","following_url":"https://api.github.com/users/julesghub/following{/other_user}","gists_url":"https://api.github.com/users/julesghub/gists{/gist_id}","starred_url":"https://api.github.com/users/julesghub/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/julesghub/subscriptions","organizations_url":"https://api.github.com/users/julesghub/orgs","repos_url":"https://api.github.com/users/julesghub/repos","events_url":"https://api.github.com/users/julesghub/events{/privacy}","received_events_url":"https://api.github.com/users/julesghub/received_events","type":"User","site_admin":false},"created_at":"2015-10-27T01:50:17Z","updated_at":"2015-10-27T01:50:17Z","body":"Hi @QwZhang, do you have an image of the material distribution, within the simulation, near the time of the crash. This will be helpful to understanding the problem.\r\nPS: just to clarify the simulation is 2D? "}}