Is there a way to delete meta-data on Eclipse run configurations?

Question

I may have a corruption problem in Eclipse run configurations. This happened after I dragged (or copy-pasted, I don't remember) a Java class called MyClass from project1 to project2 . Then I deleted project1 . When I create a new run configuration the name given is MyClass (1) . In other words, it thinks there is already a run configuration called MyClass , so the new one will have to have a number appended. ( Edit: There is no existing MyClass run configuration so there is no apparent reason for the appended number. In fact, I deleted all of my run configurations.)

How can I easily clean up meta-data and be able to build again with minimal manual effort?

If there is a meta-data deletion recommendation that gets rid of more than just run configurations, that probably would still be a good solution, if it does not create a lot of manual work to get set up to work again.

Edit: The problem might be caused by the fact that there is a launch configuration named MyClass - project1 visible in the export dialogue. project1 no longer exists, but this remnant lives on, tying up the class name MyClass . I am not sure if there is a difference between a run configuration and a launch configuration.

Answer 1

AFAIK launch configurations are stored on:

${WORKSPACE}/.metadata/.plugins/org.eclipse.debug.core/.launches

Take a look to the existent configurations and remove those that are not interesting to you.

And restart Eclipse

Answer 2

Open Eclipse. Follow Run => Run Configurations . You will see options on the left hand side. Under the Java Applications option, you will see the list of runnable classes (the ones have a main method). These class nodes on that list are right clickable. By right clicking on your running configuration, you will see New , Duplicate and Delete options. You can delete your old running configuration via delete option. To create a new running configuration, right click on Java Applications option and click on New and then configure it.

Answer 3

You could try starting eclipse with the -clean command line option .

On windows the easiest way to do that is to copy your shortcut to eclipse and add the option to the arguments list, then start using the new shortcut.