[Pratik Kunapuli]

Here is how to solve this issue:

Open Eclipse and in the package explorer on the left side of the screen, click the arrow next to the name of your project. Towards the bottom of the new entries, you should see a file called "build.properties". Double click on that file to open it. Now, where it says "package=", write the package that your main class is in after the "=", and where it says "robot.class=${package}.Robot", change whatever is after the "." to what your main class is called. We had this exact same issue and these are the steps we took to solve it.