Ok, Being fairly new at Zope, I am really confused, I think I have looked through all the FAQs, How to's, examples, and what ever, but I still can not get the right combination to get this to work (many combinations tried :-)...). The basic intent is to easily change a property "color_source" in a directory that will cause the "color1" property to be looked up from a different directory. The directory name "default" could be one of many that holds different color themes. Thanks in advance. ***************************Code This does not work: get_color method <dtml-let myname="'Colors.'+color_source+'.color1'"> <dtml-var expr="_[myname]"> </dtml-let> This works: <dtml-var "Colors.default.color1"> which renders #FFFFFF ***************************Key get_color = a method, /Business/Base/get_color color_selection = a property in the current directory containing the string "default" without quotes Colors = a folder, /Business/Colors default = a folder, /Business/Colors/default color1 = is a property under default containing the string "#FFFFFF" without quotes Zope = 2.2.2 OS = Win98 ***************************Error Message Error Type: KeyError Error Value: Colors.default.color1 Troubleshooting Suggestions This resource may be trying to reference a nonexistent object or variable Colors.default.color1. The URL may be incorrect. The parameters passed to this resource may be incorrect. A resource that this resource relies on may be encountering an error.