{"id":294415,"date":"2023-07-23T19:13:37","date_gmt":"2023-07-23T19:13:37","guid":{"rendered":"\/forum\/forums\/topic\/ansys-workbench-mechanical-topology-optimization-mapdl-error\/"},"modified":"2023-08-08T09:33:53","modified_gmt":"2023-08-08T09:33:53","slug":"ansys-workbench-mechanical-topology-optimization-mapdl-error","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ansys-workbench-mechanical-topology-optimization-mapdl-error\/","title":{"rendered":"ANSYS Workbench – Mechanical – Topology Optimization – MAPDL Error"},"content":{"rendered":"

I am trying to run a topology optimization for a part, however I keep getting the following message.<\/p>\n

“the optimization solution run was terminated. check the solver output on the solution information object for possible causes”<\/div>\n
<\/div>\n
I then open the “Open Solver File Directory” to view\u00a0if I am getting any error files or issues.<\/div>\n
I have a topo.err file that says the following.<\/div>\n
\n*** WARNING ***
\nThe optimization problem cannot be solved. Please reformulate your problem.<\/p>\n

*** ERROR ***
\nMAPDL solver terminated unexpectedly with error code 99. For more information check solver output.<\/p>\n

*** WARNING ***
\nFile ‘numCPU.dat’ not found.\n<\/p><\/div>\n

Below is the topo.out file.<\/div>\n
\n
\u00a0———————————————————————-<\/div>\n
\u00a0———-\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Welcome to Topology Optimizer\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ———–<\/div>\n
\u00a0———————————————————————-<\/div>\n
<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0Version 2022 R2 (Build: 194) from 20220527<\/div>\n
<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0Copyright 2022 ANSYS Inc. All Rights Reserved<\/div>\n
<\/div>\n
\u00a0———————————————————————-<\/div>\n
<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0Execution time: Sun Jul 23 13:45:59 2023<\/div>\n
<\/div>\n
\u00a0———————————————————————-<\/div>\n
<\/div>\n
\u00a0 \u00a0Parameter setting:<\/div>\n
\u00a0 \u00a0 \u00a0 solver\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= Scpip<\/div>\n
\u00a0 \u00a0 \u00a0 ansys version\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 = 2022 R2<\/div>\n
\u00a0 \u00a0 \u00a0 design elements\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 = OptimizationRegionElements.dat<\/div>\n
\u00a0 \u00a0 \u00a0 feedersystem list:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0– Static system ‘Static25’ with id 25: 1 load case(s) at t = 1<\/div>\n
\u00a0 \u00a0 \u00a0 filter mode\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 = 1<\/div>\n
\u00a0 \u00a0 \u00a0 penalty parameter\u00a0 \u00a0 \u00a0 \u00a0 = 3<\/div>\n
\u00a0 \u00a0 \u00a0 minimum member size\u00a0 \u00a0 \u00a0 = 0<\/div>\n
\u00a0 \u00a0 \u00a0 maximum member size\u00a0 \u00a0 \u00a0 = 0<\/div>\n
\u00a0 \u00a0 \u00a0 minimum density\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 = 0.001<\/div>\n
\u00a0 \u00a0 \u00a0 initial response scaling = yes<\/div>\n
\u00a0 \u00a0 \u00a0 boundary padding\u00a0 \u00a0 \u00a0 \u00a0 \u00a0= true,bounds,vol<\/div>\n
\u00a0 \u00a0 \u00a0 restart information\u00a0 \u00a0 \u00a0 = final<\/div>\n
\u00a0 \u00a0 \u00a0 mapdl ncnv\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= 1e+12<\/div>\n
\u00a0 \u00a0 \u00a0 maximum iteration\u00a0 \u00a0 \u00a0 \u00a0 = 500<\/div>\n
\u00a0 \u00a0 \u00a0 acc\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 = 0.001<\/div>\n
\u00a0 \u00a0 \u00a0 units\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 = MPA<\/div>\n
\u00a0 \u00a0 \u00a0 output frequency\u00a0 \u00a0 \u00a0 \u00a0 \u00a0= 1<\/div>\n
\u00a0 \u00a0 \u00a0 max intermediate files\u00a0 \u00a0= 500<\/div>\n
\u00a0 \u00a0 \u00a0 dynamic max approach\u00a0 \u00a0 \u00a0= true, 0.9<\/div>\n
\u00a0 \u00a0 \u00a0 objective 1\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 = single compliance (force load) for load step 1 of feeder system ‘Static25’ [1]<\/div>\n
\u00a0 \u00a0 \u00a0 constraint 1\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= total mass with lower bound 60 and upper bound 60<\/div>\n
\u00a0 \u00a0 \u00a0 constraint 2\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= global equivalent (von-Mises) stress for load step number 1 of feeder system ‘Static25’ with upper bound 227.273<\/div>\n
\u00a0 \u00a0 \u00a0 method\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= SCP<\/div>\n
\u00a0 \u00a0 \u00a0 acc scp\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 = 1e-06<\/div>\n
\u00a0 \u00a0 \u00a0 version scp\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 = 402<\/div>\n
\u00a0 \u00a0 \u00a0 cut off in scp\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= 1<\/div>\n
\u00a0 \u00a0 \u00a0 linear inequalities remain in active set in scp = selected always<\/div>\n
\u00a0 \u00a0 \u00a0 initial penalty scp\u00a0 \u00a0 \u00a0 = 1<\/div>\n
\u00a0 \u00a0 \u00a0 move limit scp\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= 0.5<\/div>\n
\u00a0 \u00a0 \u00a0 asymptote strategy\u00a0 \u00a0 \u00a0 \u00a0= program controlled<\/div>\n
<\/div>\n
\u00a0———————————————————————-<\/div>\n
\u00a0 \u00a0Start generating constant data…<\/div>\n
\u00a0 \u00a0…done<\/div>\n
\u00a0 \u00a0Start generating tree…<\/div>\n
\u00a0 \u00a0…finished.<\/div>\n
\u00a0 \u00a0Start generating element neighborhood…<\/div>\n
\u00a0 \u00a0 10 Percent done<\/div>\n
\u00a0 \u00a0 20 Percent done<\/div>\n
\u00a0 \u00a0 30 Percent done<\/div>\n
\u00a0 \u00a0 40 Percent done<\/div>\n
\u00a0 \u00a0 50 Percent done<\/div>\n
\u00a0 \u00a0 60 Percent done<\/div>\n
\u00a0 \u00a0 70 Percent done<\/div>\n
\u00a0 \u00a0 80 Percent done<\/div>\n
\u00a0 \u00a0 90 Percent done<\/div>\n
\u00a0 \u00a0100 Percent done<\/div>\n
\u00a0 \u00a0…finished.<\/div>\n
\u00a0Determine regions where minimum member size cannot be satisfied.<\/div>\n
\u00a0 \u00a0Starting MAPDL…<\/div>\n
<\/div>\n
\u00a0*** WARNING ***<\/div>\n
\u00a0The optimization problem cannot be solved. Please reformulate your problem.<\/div>\n
<\/div>\n
<\/div>\n
\u00a0*** ERROR ***<\/div>\n
\u00a0MAPDL solver terminated unexpectedly with error code 99. For more information check solver output.<\/div>\n
<\/div>\n
<\/div>\n
\u00a0 FINAL SUMMARY<\/div>\n
\u00a0 ————-<\/div>\n
\u00a0 Total number of model evaluations: 0<\/div>\n
<\/div>\n
\u00a0 Objective(s):<\/div>\n
\u00a0 \u00a0 [\u00a0 1] Name: Objective<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Value : 1.79769e+308<\/div>\n
<\/div>\n
\u00a0 Constraint(s):<\/div>\n
\u00a0 \u00a0 [\u00a0 1] Name: Mass Constraint_64<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 LB: 6.00000e+01 <= Value: 1.79769e+308 <= UB: 6.00000e+01\u00a0 Deviation: inf %<\/div>\n
\u00a0 \u00a0 [\u00a0 2] Name: Global Stress Constraint_71<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Value: 1.79769e+308 <= UB: 2.27273e+02\u00a0 Deviation: 7.90985e+307 % NOTE: This is an approximation to the actual value: 0.<\/div>\n
<\/div>\n
\u00a0*** WARNING ***<\/div>\n
\u00a0File ‘numCPU.dat’ not found.<\/div>\n
<\/div>\n
\u00a0———————————————————————-<\/div>\n
\u00a0–> Topology Optimizer finished with errors<\/div>\n
\u00a0 \u00a0 \u00a0Total time:\u00a0 0h 2m 1s<\/div>\n
\u00a0 \u00a0 \u00a0CPU time:\u00a0 \u00a0 0h 0m 0s<\/div>\n
\u00a0 \u00a0 \u00a0Peak Memory: 172968 K<\/div>\n
\u00a0 \u00a0 \u00a0I\/O Read:\u00a0 \u00a0 48568849 Bytes<\/div>\n
\u00a0 \u00a0 \u00a0I\/O Write:\u00a0 \u00a0928365 Bytes<\/div>\n
\u00a0———————————————————————-<\/div>\n
<\/div>\n
Below is the solve.out file.<\/div>\n
<\/div>\n
\u00a0*** FATAL ***
\nAttempt to run ANSYS in a distributed mode failed.
\nThe Distributed ANSYS process with MPI Rank ID = \u00a0 \u00a01 is not responding.
\nPlease refer to the Distributed ANSYS Guide for detailed setup and configuration information.<\/div>\n
<\/div>\n
I have looked at some other forums, but I can’t seem to figure out the issue.<\/div>\n<\/div>\n
<\/div>\n
I don’t know if I need to change someting in the “Advanced Properties” in the “Solve Process Settings”.<\/div>\n","protected":false},"template":"","class_list":["post-294415","topic","type-topic","status-closed","hentry","topic-tag-2dmaterialsandmetals-1","topic-tag-error","topic-tag-topology-optimization"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["23.56.168.190"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2451"],"_bbp_subscription":["3796","99","292997"],"_edit_lock":["1691492325:185249"],"_bbp_likes_count":["1"],"_edit_last":["185249"],"_yoast_wpseo_content_score":["60"],"_yoast_wpseo_estimated-reading-time-minutes":["3"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["294415"],"_bbp_forum_id":["27791"],"_bbp_engagement":["99","3796","289987","292997"],"_bbp_voice_count":["4"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["305279"],"_bbp_last_active_id":["305279"],"_bbp_last_active_time":["2023-09-07 11:03:06"]},"test":"johnson-aarontamu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/294415","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\/294415\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=294415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}