{"id":403798,"date":"2025-01-06T21:33:26","date_gmt":"2025-01-06T21:33:26","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403798\/"},"modified":"2025-01-06T21:33:26","modified_gmt":"2025-01-06T21:33:26","slug":"403798","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403798\/","title":{"rendered":"Reply To: HET_RXN_RATE UDF"},"content":{"rendered":"<p>&lt;p&gt;Got it running once I changed&nbsp; &lt;span style=&#8221;color: #236fa1;&#8221;&gt;Thread *tp = pt[2]&lt;\/span&gt; to &lt;span style=&#8221;color: #236fa1;&#8221;&gt;Thread *tp = pt[0]&lt;span style=&#8221;color: #000000;&#8221;&gt; It ran for a while (which had not hapened before!) then got Floating point error.&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;2 is the Phase ID in the Phase Interactions GUI but since that phase is the primary phase 0 seems to work.&lt;br&gt;&lt;br&gt;Since the reaction is contained in the UDF. Should the Reaction under Properties in the Material (for Phase 1 and Phase 2) be set to none or finite-rate.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/06-01-2025-1736199182-mceclip0.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-403798","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=\"Got it running once I changed Thread *tp = pt[2] to Thread *tp = pt[0] It ran for a while (which had not hapened before!) then got Floating point error.2 is the Phase ID in the Phase Interactions GUI but since that phase is the primary phase 0 seems\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403798\/\" \/>\n\t<meta name=\"generator\" 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