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There seems to be file representing non-existing class. Please remove the file: EnvironmentProviders/ProfileTypes/Execution/nb-j2ee-deployment.instance thrown exception java.lang.ClassNotFoundException: org.netbeans.modules.j2ee.deployment.impl.projects.J2eeProfileEnvironment]
The definition is correct in projects branch but invalid in trunk. It seems that we have wrongly synchronized branches in this case.
this is gone (probably somebody fixed this long ago and forgot to close the issue)