{"id":437845,"date":"2025-07-26T13:02:36","date_gmt":"2025-07-26T13:02:36","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/running-the-same-finel-gives-different-results\/"},"modified":"2025-07-28T06:15:01","modified_gmt":"2025-07-28T06:15:01","slug":"running-the-same-finel-gives-different-results","status":"answered","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/running-the-same-finel-gives-different-results\/","title":{"rendered":"Running the same file, gives different results"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;&lt;p&gt;&lt;p&gt;&lt;p&gt;&lt;p&gt;I&#8217;m encountering inconsistent results when running the same LS-DYNA model file using the same software version (LS-PrePost(R) V4.7.7 &#8211; 17Feb2020, LS-Run 2021 R2). Even though I copy the model to a different directory and execute it with identical settings&mdash;same number of CPUs (NCPU) and memory allocation&mdash;I still get different outputs. What&#8217;s more, I even get varying results when I rerun the model in the &lt;em data-start=&#8221;460&#8243; data-end=&#8221;466&#8243;&gt;same directory. In such cases, LS-DYNA deletes the previous result files and generates new ones, yet the results still differ each time. The settings of running the folder are below.<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/07\/26-07-2025-1753534745-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;The origional results &#8211; It shall be like this, this is the time-force curve:<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/07\/26-07-2025-1753535004-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/07\/26-07-2025-1753535127-mceclip0.png\" \/>I am using a shared memory parallel processing, the calculations may be executed in different order, depending on CPU availability and the workload on each CPU.&nbsp; Therefore, I specify the number of CPUs as a negative number to maintain consistency. But I am getting completely different curves, even when I run the corrected file again. Please any suggestions to get the previous results back.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-437845","topic","type-topic","status-answered","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I&#039;m encountering inconsistent results when running the same LS-DYNA model file using the same software version (LS-PrePost(R) V4.7.7 - 17Feb2020, LS-Run 2021 R2). Even though I copy the model to a different directory and execute it with identical settings\u2014same number of CPUs (NCPU) and memory allocation\u2014I still get different outputs. 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Even though I copy the model to a different directory and execute it with identical settings\u2014same number of CPUs (NCPU) and memory allocation\u2014I still get different outputs. 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Even though I copy the model to a different directory and execute it with identical settings\u2014same number of CPUs (NCPU) and memory allocation\u2014I still get different outputs. 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What's more, I even get"},"aioseo_meta_data":[],"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tRunning the same file, gives different results\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"Running the same file, gives different results","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/running-the-same-finel-gives-different-results\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27814"],"_bbp_topic_id":["437845"],"_bbp_author_ip":["87.78.131.139"],"_bbp_last_reply_id":["438010"],"_bbp_last_active_id":["438010"],"_bbp_last_active_time":["2025-07-29 05:45:51"],"_bbp_reply_count":["2"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["1"],"_bbp_engagement":["573583"],"_btv_view_count":["498"],"_bbp_topic_status":["answered"],"_edit_last":["573583"],"_bbp_revision_log":["a:5:{i:437846;a:2:{s:6:\"author\";i:573583;s:6:\"reason\";s:0:\"\";}i:437847;a:2:{s:6:\"author\";i:573583;s:6:\"reason\";s:11:\"forgot foto\";}i:437848;a:2:{s:6:\"author\";i:573583;s:6:\"reason\";s:11:\"More better\";}i:437849;a:2:{s:6:\"author\";i:573583;s:6:\"reason\";s:6:\"better\";}i:437850;a:2:{s:6:\"author\";i:573583;s:6:\"reason\";s:11:\"More better\";}}"],"_bbp_notification_enabled":["573583","480261"],"_bbp_subscription":["523","492369"]},"test":"mukattashlbb-rwth-aachen-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/437845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":5,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/437845\/revisions"}],"predecessor-version":[{"id":437850,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/437845\/revisions\/437850"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=437845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}