https://forums.autodesk.com/t5/revit-api-forum/isolate-assemblyinstances-on-view/m-p/14168209#M85762 <P>Yes, you can isolate an AssemblyInstance in a view via the API using IsolateElementsTemporary(). However, simply feeding the AssemblyInstance.Id directly to the method will fail or act empty. You must include both the Assembly ID and the Assembly Member IDs in your list.</P><P>&nbsp;</P><P>Did you find this post helpful? If it gave you one or more solutions,</P><P>don't forget to click the Accept Solution button and leave a &lt; like !</P> Tue, 16 Jun 2026 19:16:17 GMT Radwan-Almsora 2026-06-16T19:16:17Z https://forums.autodesk.com/t5/revit-api-forum/isolate-assemblyinstances-on-view/m-p/14168156#M85761 <P>Is it possible to isolate AssemblyInstance elements in a view the same way as when doing it manually in Revit?</P><P>It seems that the only option available through the API is to isolate the assembly members individually using GetMemberIds(), but the result is not the same as the manual <STRONG>Temporary Hide/Isolate → Isolate Element</STRONG> command.</P> Tue, 16 Jun 2026 18:18:57 GMT https://forums.autodesk.com/t5/revit-api-forum/isolate-assemblyinstances-on-view/m-p/14168156#M85761 gtuda123 2026-06-16T18:18:57Z https://forums.autodesk.com/t5/revit-api-forum/isolate-assemblyinstances-on-view/m-p/14168209#M85762 <P>Yes, you can isolate an AssemblyInstance in a view via the API using IsolateElementsTemporary(). However, simply feeding the AssemblyInstance.Id directly to the method will fail or act empty. You must include both the Assembly ID and the Assembly Member IDs in your list.</P><P>&nbsp;</P><P>Did you find this post helpful? If it gave you one or more solutions,</P><P>don't forget to click the Accept Solution button and leave a &lt; like !</P> Tue, 16 Jun 2026 19:16:17 GMT https://forums.autodesk.com/t5/revit-api-forum/isolate-assemblyinstances-on-view/m-p/14168209#M85762 Radwan-Almsora 2026-06-16T19:16:17Z