{"id":460302,"date":"2026-06-24T17:26:10","date_gmt":"2026-06-24T17:26:10","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/gpu-solver-crash-when-setting-point-pressure-monitor-in-fluent-2026-r1\/"},"modified":"2026-06-24T17:26:10","modified_gmt":"2026-06-24T17:26:10","slug":"gpu-solver-crash-when-setting-point-pressure-monitor-in-fluent-2026-r1","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/gpu-solver-crash-when-setting-point-pressure-monitor-in-fluent-2026-r1\/","title":{"rendered":"GPU Solver Crash When Setting Point Pressure Monitor in Fluent 2026 R1"},"content":{"rendered":"

<p class=”ds-markdown-paragraph”><span class=””>Dear Ansys community,<\/span><\/p><p class=”ds-markdown-paragraph”><span class=””>I am using <\/span><span class=””>Fluent 2026 R1<\/span><\/strong><span class=””> with the <\/span><span class=””>GPU solver<\/span><\/strong><span class=””> enabled, running on a parallel cluster (MPI). The simulation runs perfectly fine without any monitors. However, when I define a <\/span><span class=””>point pressure monitor<\/span><\/strong><span class=””> (Report Definition → Point → Pressure) before initialization, the calculation crashes shortly after starting, with the following error messages:<\/span><\/p><\/p>\n

Abort(17) on node 3 (rank 3 in comm 0): Fatal error in PMPI_Waitall: See the MPI_ERROR field in MPI_Status for the error code\nAbort(17) on node 2 (rank 2 in comm 0): Fatal error in PMPI_Waitall: See the MPI_ERROR field in MPI_Status for the error code\nError in the fluent (fl) process : ended abnormally<\/pre>\n
<p class=”ds-markdown-paragraph”><span class=””>The crash is reproducible and only occurs when the point monitor is active. I have tried different monitor report intervals, but the issue persists.<\/span><\/p><p class=”ds-markdown-paragraph”><span class=””>My questions are:<\/span><\/p><\/p>\n
    \n
  1. <p class=”ds-markdown-paragraph”><span class=””>Does the GPU solver in <\/span><span class=””>2026 R1<\/span><\/strong><span class=””> officially support <\/span><span class=””>point monitors<\/span><\/strong><span class=””> (e.g., pressure at a specific coordinate)? If not, where can I find the official list of supported monitor types for the GPU solver?<\/span><\/p><\/li>\n
  2. <p class=”ds-markdown-paragraph”><span class=””>Are there any workarounds to monitor a local pressure value while still using GPU acceleration? <\/span><\/p><\/li>\n
  3. <p class=”ds-markdown-paragraph”><span class=””>Apart from switching back to the CPU solver, are there any recommended MPI settings or environment variables that might prevent this crash (e.g., changing the MPI implementation, disabling certain BTLs, or adjusting the monitor frequency)?<\/span><\/p><\/li>\n<\/ol>\n
    <p class=”ds-markdown-paragraph”><span class=””>I am aware that GPU solver support is evolving, and I have seen mentions of “volume and mass monitors” being added in 2024 R2, but I couldn’t find clear documentation on point monitors for 2026 R1. Any guidance, official reference, or personal experience would be greatly appreciated.<\/span><\/p><p class=”ds-markdown-paragraph”><span class=””>Thank you in advance for your help!<\/span><\/p><\/p>\n","protected":false},"template":"","class_list":["post-460302","topic","type-topic","status-publish","hentry","topic-tag-fluent","topic-tag-gpu"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["460302"],"_bbp_subscription":["702563"],"_bbp_author_ip":["240e:659:3153::"],"_bbp_last_reply_id":["0"],"_bbp_last_active_id":["460302"],"_bbp_last_active_time":["2026-06-24 17:26:10"],"_bbp_reply_count":["0"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["1"],"_bbp_engagement":["702563"],"_btv_view_count":["48"],"_bbp_topic_status":["unanswered"]},"test":"1985184216qq-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/460302","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\/460302\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=460302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}