{"id":457489,"date":"2026-05-01T04:37:43","date_gmt":"2026-05-01T04:37:43","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/error-the-body-selection-must-be-a-part-of-body-contact-tracker\/"},"modified":"2026-05-01T04:37:43","modified_gmt":"2026-05-01T04:37:43","slug":"error-the-body-selection-must-be-a-part-of-body-contact-tracker","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/error-the-body-selection-must-be-a-part-of-body-contact-tracker\/","title":{"rendered":"Error: The Body Selection must be a part of Body Contact Tracker"},"content":{"rendered":"<p>&lt;p&gt;I am trying to extract contact force using contact force tracker (added by right clicking the &#8216;Solution Information&#8217;) scoped to a rigid body (tool) interacting with a flexible body (workpiece), when trying to simulate an orthogonal cutting process in ANSYS 2021R1 LS-DYNA. I only used &#8216;body interaction&#8217; as a connection between these two bodies, with a frictional coffecient entered as 0.3, with no other contacts built betweeen these bodies (like bonded, etc). However, when I try to evaluate the results after solution has finished, the contact force tracker doesn&#8217;t work, and generates me this error as I am sharing in the picture. I don&#8217;t know how to add the body contact tracker, because I don&#8217;t see any option to add it from anywhere (like it doesn&#8217;t show up in the &#8216;Solution Information&#8217;). Can you tell me how should I address this issue?&lt;br&gt;&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2026\/05\/01-05-2026-1777610126-Error.jpg\" alt=\"\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-457489","topic","type-topic","status-publish","hentry","topic-tag-ansys-ls-dyna-1","topic-tag-body-interaction-1","topic-tag-contact-force-reaction"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27814"],"_bbp_topic_id":["457489"],"_bbp_subscription":["682404","13640"],"_bbp_author_ip":["139.179.188.190"],"_bbp_last_reply_id":["457506"],"_bbp_last_active_id":["457506"],"_bbp_last_active_time":["2026-05-02 02:11:18"],"_bbp_reply_count":["2"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["682404","13640"],"_btv_view_count":["91"],"_bbp_topic_status":["unanswered"]},"test":"e217733metu-edu-tr"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/457489","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\/457489\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=457489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}