1. Do not use term 'member', wherever possible replace it with 'field' or 'method', otherwise use 'field or method'.
2. Make message more informative, mention name of class in which field or method is not found.
3. In messages about unresolved method or constructor, add parameter types to method name, e.g. action(String), otherwise message may be ambiguous, if for example method action(Integer) exists.