{"id":363731,"date":"2024-04-23T13:30:35","date_gmt":"2024-04-23T13:30:35","guid":{"rendered":"\/forum\/forums\/topic\/chemkin-parallel-hangs-on-2024r1\/"},"modified":"2024-04-23T13:30:35","modified_gmt":"2024-04-23T13:30:35","slug":"chemkin-parallel-hangs-on-2024r1","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/chemkin-parallel-hangs-on-2024r1\/","title":{"rendered":"Chemkin Parallel hangs on 2024R1"},"content":{"rendered":"<p>Hello,<\/p>\n<p>Sorry for the lack of specific information, but I just wanted to ask about the following issue:<\/p>\n<p><strong>Issue:<\/strong> Chemkin Uncertainty analysis using multiple cores hangs on the first round of runs (107 total runs). This is in 2024R1 using eight cores.&nbsp;<\/p>\n<p><strong>Computer:<\/strong> AMD Epyc Rome, two processor workstation, 24 cores total, 64 GB RAM, Windows 10 pro.<\/p>\n<p><strong>Troubleshooting:<\/strong> The exact same analysis runs fine in 2023R2 (same case file too).<\/p>\n<p><strong>Questions:<\/strong> were there any significant changes to Chemkin 2024R1 that would causes this behavior? Did the default MPI change? Also, can I change the MPI that Chemkin uses? I find that in Fluent I have to change the default MPI to get good parallel performance with AMD processors.<\/p>\n<p>Thanks!<\/p>\n<p>-Mike<\/p>\n","protected":false},"template":"","class_list":["post-363731","topic","type-topic","status-closed","hentry","topic-tag-amd-1","topic-tag-chemkin","topic-tag-epyc-2","topic-tag-parallel"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello,Sorry for the lack of specific information, but I just wanted to ask about the following issue:Issue: Chemkin Uncertainty analysis using multiple cores hangs on the first round of runs (107 total runs). This is in 2024R1 using eight cores. Computer: AMD Epyc Rome, two processor workstation, 24 cores total, 64 GB RAM, Windows 10 pro.Troubleshooting:\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/chemkin-parallel-hangs-on-2024r1\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Chemkin Parallel hangs on 2024R1 | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hello,Sorry for the lack of specific information, but I just wanted to ask about the following issue:Issue: Chemkin Uncertainty analysis using multiple cores hangs on the first round of runs (107 total runs). 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