Error in xCore file in Eclipse 4.3(Kepler)

Error in xCore file in Eclipse 4.3(Kepler)

pI have just installed eclipse 4.3(Kepler) and when i open my xcore file
it gives me some error:/p blockquote pCouldn't resolve reference to
XAnnotationDirective 'GenModel'br Couldn't resolve reference to
XAnnotationDirective 'ExtendedMetaData'. /p /blockquote pwhat could be the
reason? any help will be appreciated. /p pRegardsbr Sharif /p