Version: (using KDE KDE 3.2.0) OS: Linux Changing the properties of an existing operation pops up the message box "Operation Name Invalid -- An operation with that signature already exists in Test. Choose a different name or parameter list.". How to reproduce: Create a new document, add a new class "Test". Add an operation "op" without parameters. In the list of operations, select this operation and press button "Properties". Change something, e.g. visibility to "Protected" and press "OK". Message box appears as described above. Doing something similar with attributes (changing the visibility of an existing attribute) is no problem.
*** This bug has been marked as a duplicate of 73926 ***