{"id":382589,"date":"2024-09-13T10:02:01","date_gmt":"2024-09-13T10:02:01","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/node-999999-fatal-signal-raised-sig-segmentation-fault\/"},"modified":"2024-09-13T10:02:01","modified_gmt":"2024-09-13T10:02:01","slug":"node-999999-fatal-signal-raised-sig-segmentation-fault","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/node-999999-fatal-signal-raised-sig-segmentation-fault\/","title":{"rendered":"Node 999999 Fatal signal raised sig = Segmentation fault"},"content":{"rendered":"<p>&lt;p&gt;Hi,&lt;\/p&gt;&lt;p&gt;I am encountering the error &#8220;Node 999999 Fatal signal raised: sig = Segmentation fault&#8221; at the beginning of my ANSYS Fluent run, which causes Fluent to crash.&lt;\/p&gt;&lt;p&gt;My 2D model consists of two airfoils: front and rear. The front airfoil pitches harmonically using a named expression, while the rear airfoil oscillates based on the wake from the front airfoil using a UDF. Additionally, I have another UDF that outputs the pitching angle of the rear airfoil.&lt;\/p&gt;&lt;p&gt;During the simulation, I received the following error (copied from the error log). Could anyone please help me in resolving this issue?&lt;\/p&gt;&lt;p&gt;Sometimes it shows a &#8220;<strong>Received Signal SIGSEGV<\/strong>&#8221; error as well.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&lt;br&gt;Error [node 999999] [time 9\/13\/24 19:48:16] Abnormal Exit!&lt;br&gt;Node 999999 Fatal signal raised sig = Segmentation fault&lt;br&gt;&nbsp;5e5b1960 CX_Primitive_Error&lt;br&gt;&nbsp;edcdb9d0 log2f&lt;br&gt;&nbsp;5e61ddf0 logical_right_shift&lt;br&gt;&nbsp;cb7de530 _C_specific_handler&lt;br&gt;&nbsp;f06f4f20 _chkstk&lt;br&gt;&nbsp;f066ddd0 RtlFindCharInUnicodeString&lt;br&gt;&nbsp;f06f4010 KiUserExceptionDispatcher&lt;br&gt;&nbsp;e2dc0000 Ordinal0&lt;br&gt;&nbsp;5e060210 Cell_Functions_List_Cleared&lt;br&gt;&nbsp;5e01ad80 Add_ReportDefinition&lt;br&gt;&nbsp;5e060210 Cell_Functions_List_Cleared&lt;br&gt;&nbsp;5e060210 Cell_Functions_List_Cleared&lt;br&gt;&nbsp;5e019420 Evaluate_Udf_ReportDefinitions&lt;br&gt;&nbsp;5df61620 Init_Error_Handler&lt;br&gt;&nbsp;5e607fd0 eval&lt;br&gt;&nbsp;5e607fd0 eval&lt;br&gt;&nbsp;5e607fd0 eval&lt;br&gt;&nbsp;5e607fd0 eval&lt;br&gt;&nbsp;5e60a470 set_cc&lt;br&gt;&nbsp;5e60ae50 eval_errprotect&lt;br&gt;&nbsp;5e607fd0 eval&lt;br&gt;&nbsp;5e607fd0 eval&lt;br&gt;&nbsp;5e607fd0 eval&lt;br&gt;&nbsp;5e607fd0 eval&lt;br&gt;&nbsp;5e60a470 set_cc&lt;br&gt;&nbsp;5e60ae50 eval_errprotect&lt;br&gt;&nbsp;5e5b2960 CX_Interpret_String&lt;br&gt;&nbsp;5cbb6cc0 rpgetvar_errprotect&lt;br&gt;&nbsp;5e61ddf0 logical_right_shift&lt;br&gt;&nbsp;eeca2560 BaseThreadInitThunk&lt;br&gt;&nbsp;f06aaf00 RtlUserThreadStart&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-382589","topic","type-topic","status-publish","hentry","topic-tag-2d-airfoil","topic-tag-ansysfluent","topic-tag-named-expressions","topic-tag-udf"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi,I am encountering the error &quot;Node 999999 Fatal signal raised: sig = Segmentation fault&quot; at the beginning of my ANSYS Fluent run, which causes Fluent to crash.My 2D model consists of two airfoils: front and rear. The front airfoil pitches harmonically using a named expression, while the rear airfoil oscillates based on the wake from\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/node-999999-fatal-signal-raised-sig-segmentation-fault\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Node 999999 Fatal signal raised sig = Segmentation fault | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi,I am encountering the error &quot;Node 999999 Fatal signal raised: sig = Segmentation fault&quot; at the beginning of my ANSYS Fluent run, which causes Fluent to crash.My 2D model consists of two airfoils: front and rear. 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The front airfoil pitches harmonically using a named expression, while the rear airfoil oscillates based on the wake from\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/node-999999-fatal-signal-raised-sig-segmentation-fault\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/udf\\\/#listItem\",\"name\":\"udf\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/udf\\\/#listItem\",\"position\":3,\"name\":\"udf\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/udf\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/node-999999-fatal-signal-raised-sig-segmentation-fault\\\/#listItem\",\"name\":\"Node 999999 Fatal signal raised sig = Segmentation fault\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/node-999999-fatal-signal-raised-sig-segmentation-fault\\\/#listItem\",\"position\":4,\"name\":\"Node 999999 Fatal signal raised sig = Segmentation fault\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic-tag\\\/udf\\\/#listItem\",\"name\":\"udf\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/node-999999-fatal-signal-raised-sig-segmentation-fault\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/node-999999-fatal-signal-raised-sig-segmentation-fault\\\/\",\"name\":\"Node 999999 Fatal signal raised sig = Segmentation fault | Ansys Learning Forum\",\"description\":\"Hi,I am encountering the error \\\"Node 999999 Fatal signal raised: sig = Segmentation fault\\\" at the beginning of my ANSYS Fluent run, which causes Fluent to crash.My 2D model consists of two airfoils: front and rear. 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