I am having a problem using data validation with ug nx 8.03.4 and excel 2010. I have my expressions linked in the spreadsheets. I want to use the data validation feature in excel because I have an expression that can only have 2 values. RADIUS and CHMAFER which chooses if my model will have a radius or chamfer on a specific edge. I can update it fine in excel if I type in the value ="CHAMFER" then the model updates. when I use the data validation validation it doesn't work. I tried formatting the cells to text and general, but no luck.