{"id":293818,"date":"2023-07-19T10:56:32","date_gmt":"2023-07-19T10:56:32","guid":{"rendered":"\/forum\/forums\/reply\/293818\/"},"modified":"2023-07-19T10:56:32","modified_gmt":"2023-07-19T10:56:32","slug":"293818","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/293818\/","title":{"rendered":"Reply To: SIGSEGV error during initialization in the fluent simulation with UDF"},"content":{"rendered":"<p>&lt;p&gt;Hello&lt;\/p&gt;&lt;p&gt;SIGSEGV error is returned when there are issues related to storage\/memory or data is missing in a place where it needs to be supplied.&lt;\/p&gt;&lt;p&gt;The concern here is the macro defined as: Material *m = THREAD_MATERIAL(pt). The THREAD_MATERIAL macro returns a pointer that is associated with a cell thread (t) and NOT a phase thread (pt) as you have defined. Please have a look at the section 2.3.29.3 of the Ansys UDF User Manual for reference related to this and the &#8216;mixture_species_loop&#8217; definition as well.&lt;\/p&gt;&lt;p&gt;<strong>Link:<\/strong> <a href=\"https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v221\/en\/flu_udf\/flu_udf_sec_define_property.html%23x1-1950003.3.18\">2.3.29. DEFINE_PROPERTY UDFs (ansys.com)<\/a>&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;ui-provider fy b c d e f g h i j k l m n o p q r s t u v w x y z ab ac ae af ag ah ai aj ak&#8221; dir=&#8221;ltr&#8221;&gt;If you are not able to access the link, please refer to this forum discussion: <a title=\"\/forum\/forums\/topic\/using-help-with-links\/\" href=\"\/forum\/forums\/topic\/using-help-with-links\/\" target=\"_blank\" rel=\"noreferrer noopener\">Using Help with links (ansys.com)<\/a>&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span class=&#8221;ui-provider fy b c d e f g h i j k l m n o p q r s t u v w x y z ab ac ae af ag ah ai aj ak&#8221; dir=&#8221;ltr&#8221;&gt;Thanks!&lt;\/span&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-293818","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"HelloSIGSEGV error is returned when there are issues related to storage\/memory or data is missing in a place where it needs to be supplied.The concern here is the macro defined as: Material *m = THREAD_MATERIAL(pt). 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