Where I work we have many different applications tested with SilkTest, each has a different framework. In one of the frameworks , the Expression window, which is commonly used in debug mode does not work at all. You can enter a legal expression, which would work in the other frameworks for the other applications, and it won't return any value. I have searched the forums and haven't been able to find any information on this problem. Does anyone know what could cause this feature to not function? This particular framework was designed long ago by a contractor and is different from our current design, leading me to think it's something in the way the class hierarcy is set up that is causing the viewer not to work.