{"id":461154,"date":"2026-07-09T17:45:05","date_gmt":"2026-07-09T17:45:05","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/error-about-sph-neighborhood\/"},"modified":"2026-07-09T17:45:05","modified_gmt":"2026-07-09T17:45:05","slug":"error-about-sph-neighborhood","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/error-about-sph-neighborhood\/","title":{"rendered":"Error about SPH neighborhood"},"content":{"rendered":"<p>&lt;p data-pm-slice=&#8221;0 0 []&#8221;&gt;Hello,&lt;\/p&gt;&lt;p&gt;I encountered the following error while running my simulation on an HPC&nbsp; using LS-DYNA R12:&lt;\/p&gt;&lt;p&gt;*** Error 41434 (SOL+1434)&lt;\/p&gt;&lt;p&gt;Error encountered in SPH neighborhood search routine.&lt;\/p&gt;&lt;p&gt;Please check mes#### file for detailed information.&lt;\/p&gt;&lt;p&gt;Based on another Q&amp;A on this forum, I increased NMNEIGH in *CONTROL_SPH and ran the simulation again. However, the simulation terminated with the same error. In fact, the error occurred even earlier than before.First run: error occurred at 1.7 s of simulation time.&nbsp;Second run (after increasing NMNEIGH): error occurred at 1.2 s of simulation time.&nbsp;I am using LS-DYNA R12.&lt;\/p&gt;&lt;p&gt;Could someone please help me understand: What is the most common cause of this error?&lt;\/p&gt;&lt;p&gt;What is the solution?&lt;\/p&gt;&lt;p&gt;Is there a way to prevent the simulation from terminating when this error occurs, or is the termination unavoidable?&lt;\/p&gt;&lt;p&gt;Any suggestions would be greatly appreciated.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-461154","topic","type-topic","status-publish","hentry","topic-tag-hpc-cluster-1","topic-tag-lsdyna","topic-tag-mpp","topic-tag-sph"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27814"],"_bbp_topic_id":["461154"],"_bbp_author_ip":["142.104.85.82"],"_bbp_last_reply_id":["461162"],"_bbp_last_active_id":["461162"],"_bbp_last_active_time":["2026-07-09 22:07:39"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["682300","13640"],"_btv_view_count":["42"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["13640","682300"]},"test":"lsdyna928gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/461154","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":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/461154\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=461154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}