I have a custom application written using J2SE 1.4 and running on WebSphere v6.0. My application server is Red Hat Linux v5.4. Here is my issue. I need to make changes to my custom application. The IDE I'm using is MyEclipseBlue v10.7, and I'm having an issue stepping through the EJBs. I keep getting errors saying it doesn't recognize the line numbers, even though they should be there. The MyEclipseBlue Tech support is recommending that I upgrade the application to WebSphere v6.1 But if I do that, it won't run on my production server, which is WebSphere v6.0 Right? (Question 1) So I'm wondering how hard it is to upgrade WebSphere. (Question 2) I can get around in Linux but it's challenging. And my knowledge of WebSphere is just what I've picked up within the last few years. Not sure if I should go there or just keep struggling with my IDE. Any advice?