Apologies if I already posted something similar regarding this but really at a loose end here and thought I would elaborate. As you can see from the screenshot and code examples below. When the app running the Lucee engine returns the tag list (in orange on top of screenshot), it is not returning the same tag list as the CF2018 version is. The app needs these tags found in CF2018 to work. Am I missing something here? Why is the Lucee version not calling the same tags? Do I need to copy custom tags over from the CF2018 version that are not on Lucee? Desperate for some help 🙏 Lucee 5.4.3.2 cfscript tag_list = GetBaseTagList(","); dump(tag_list); // "CFSAVECONTENT" abort; /cfscript CF2018 cfset ancestorList = GetBaseTagList() cfdump var="#ancestorList#"brbr cfabort