My model tree has one column called PART_DESC (for part description). Every component within my assembly has a value for this parameter. However, when I go to create a simplified rep within a large assembly the values don't all show up. They only show up if the part has been regenerated and is in session. In Pro/E 2001 the parameters values showed up regardless of whether or not it is in session. My assembly is quite large with numerous components and creating a simplified rep is much easier when I can select based on a part desciption rather than a part number. Does anyone know a way to get the PART_DESC parameter value to display all the time regardless of whether it is in session or not? Thanks.