Hello and thank you for putting up with this noob question. The directions on the website or anything I have found on the internet are not very descriptive. I have downloaded Eclipse and Java JDK version 7 and successfully installed both of the applications on my computer, but I must have missed something. My code is perfect and has zero red lines, but when I try to run it I get this error: "Error: Could not find or load main class org.eclipse.persistence.internal.libraries.asm.util.ASMifierClassVisitor" I am not a computer programmer but I am just using what I have learned in my first computer science class to do a physics project. Please help me get this stupid program set up so I can have my project done by the due date.