Eclipse RCP- org.eclipse.ui.plugin missing

I've written an Eclipse RCP application that runs fine in Eclipse, however, packaging it to be a standalone application has been tricky. I've worked my way though a few class path errors, but now I'm getting a new one.

After running the export wizard and launching my application, it throws a ClassDefError and ClassNotFoundException, specifically it's looking for org.eclipse.ui.plugin.AbstractUIPlugin. I did not find this in my copy of the eclipse SDK, and I downloaded the SDK again to be sure, and still couldn't find it. I found a jar online that supposedly contained the fiel along with some other eclipse packages,开发者_C百科 however, I then got this:

NoSuchMethodError: org.eclipse.ui.plugin.AbstractUIPlugin: method ()V not found

I figure the problem is more I did something wrong rather than this class is actually missing, but I've gone though all the configurations and I'm sure all the required packages and dependencies are included. Any ideas?

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Download and install the new version of adt plugin 21.0.0.

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Does your application works when you run from Eclipse? If so then try to open your plugin.xml, go to Runtime and on the bottom right part of the window you should see Classpath. Try adding the required plugins there.