GMF Troubleshooting 4

Some helpful tips for working with GMF.

1. GMF Troubleshooting
2. GMF Troubleshooting 2
3. GMF Troubleshooting 3
4. GMF Troubleshooting 4
5. GMF Troubleshooting 5
6. GMF Troubleshooting 6
7. GMF Troubleshooting 7
8. GMF Troubleshooting 8
9. GMF Troubleshooting 9

I get a ClassNotFoundException for a package/class which I removed a long time ago!
AKA:
I get the following exception:

org.osgi.framework.BundleException: Exception in org.openiaml.model.model.diagram.part.IamlDiagramEditorPlugin.start() of bundle org.openiaml.model.diagram.
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:1018)
...
Caused by: java.lang.ExceptionInInitializerError
at org.openiaml.model.model.util.ModelSwitch.<init>(ModelSwitch.java:46)
...
Caused by: org.eclipse.emf.common.util.WrappedException: java.lang.ClassNotFoundException: model.ModelPackage
at org.eclipse.emf.ecore.plugin.RegistryReader$EPackageDescriptor.getEPackage(RegistryReader.java:215)
...
Caused by: java.lang.ClassNotFoundException: model.ModelPackage
at java.lang.ClassLoader.findClass(Unknown Source)
...
Root exception:
java.lang.ExceptionInInitializerError
at org.openiaml.model.model.util.ModelSwitch.<init>(ModelSwitch.java:46)
...

Try the following solutions:

1. Deleting all your generated code from .gmfgen and re-generating it
2. Editing plugin.xml - your old package/class may be referenced there!