{"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":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello,I encountered the following error while running my simulation on an HPC using LS-DYNA R12:*** Error 41434 (SOL+1434)Error encountered in SPH neighborhood search routine.Please check mes#### file for detailed information.Based on another Q&amp;A on this forum, I increased NMNEIGH in *CONTROL_SPH and ran the simulation again. 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