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Created attachment 83227 [details] Error Log entry from eclipse Build ID: M20070921-1145 Steps To Reproduce: No simple explanation. Sometimes refactoring works, sometimes not. If not it is consistent. Had enable using a dialog when refactoring to get a clue to the error. See attach error log entry. The root cause seems to be: Caused by: java.lang.NoClassDefFoundError: org/eclipse/jst/jsp/core/internal/java/search/JSPSearchSupport
A NoClassDefFoundError usually indicates a broken installation, in this case a mismatch between versions of org.eclipse.jst.jsp.ui and org.eclipse.jst.jsp.core. Was this maintenance build unzipped over the original 2.0.0 release?
Closing from lack of response.