{"id":372120,"date":"2024-07-16T13:58:57","date_gmt":"2024-07-16T13:58:57","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-meshing-error-multithreading-violation\/"},"modified":"2024-07-16T13:58:57","modified_gmt":"2024-07-16T13:58:57","slug":"fluent-meshing-error-multithreading-violation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-meshing-error-multithreading-violation\/","title":{"rendered":"Fluent Meshing ERROR: multithreading violation"},"content":{"rendered":"

Hi,<\/p>\n

I keep getting the following error when creating a hybrid (tetra+prism) volume mesh for a complex geoemtry. The surface mesh has good max skewness (0.59), good min dihedral (40deg) and there are no free faces, self interceptions or any other issue. I am generating the volume mesh from the linux environment, starting from the surface mesh. Using the auto-mesh command, everything is fine (no stair stepping of the prism layers) until it gets to the pyramid generations stage, where the following error occurs:<\/p>\n

Retriangulating adjacent zone int-box-in:875.<\/div>\n
 <\/div>\n
Remeshing overlapped thread int-box-in:875 …<\/div>\n
Deleting overlap on int-box-in:875 …<\/div>\n
Improving mesh on int-box-in:875 …Done.New node zone boundary-node-35148 created for boundary nodes not in current domain (tetrahedral).<\/div>\n
 <\/div>\n
Generating Pyramids…<\/div>\n
 <\/div>\n
Creating pyramids<\/div>\n
prism-side-35058 (6944 faces)<\/div>\n
 <\/div>\n
===============Message from the Cortex Process================================<\/div>\n
 <\/div>\n
Compute processes interrupted. Processing can be resumed.<\/div>\n
 <\/div>\n
==============================================================================<\/div>\n
 <\/div>\n
*** ERROR: multithreading violation ***<\/div>\n
You are running a multithreaded application but<\/div>\n
you set MLX5_SINGLE_THREADED=1. Please unset it.<\/div>\n
*** ERROR: multithreading violation ***<\/div>\n
You are running a multithreaded application but<\/div>\n
you set MLX5_SINGLE_THREADED=1. Please unset it.<\/div>\n
 The tgrid process could not be started.<\/div>\n
 <\/div>\n
Warning: An error or interrupt occurred while reading the journal file.<\/div>\n
Some commands may not have been completed.<\/div>\n
 <\/div>\n
 <\/div>\n
Meshing> Halting due to end of file on input.<\/div>\n
Transcript Stop Time:  14:46:27, 16 Jul 2024 <\/div>\n
Total Transcript Time: 4 Minute 47 Second.<\/div>\n

===========================================================================================<\/p>\n

I’ve not yet had success solving this problem…Any suggestion on what the origin of this error may be? <\/p>\n

I’ve tried running the mesh generation on a single node to limit the internode communication, but that did not solve the issue. Reducing the number of prism layers did not make a change either.<\/p>\n","protected":false},"template":"","class_list":["post-372120","topic","type-topic","status-closed","hentry","topic-tag-fluent-mesh","topic-tag-meshing"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["304461","62"],"_bbp_author_ip":["147.188.251.161"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["155"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["372120"],"_bbp_forum_id":["27790"],"_bbp_engagement":["62","304461"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["372695"],"_bbp_last_active_id":["372695"],"_bbp_last_active_time":["2024-07-19 09:53:17"]},"test":"jma337student-bham-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/372120","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\/372120\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=372120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}