hmmmmm no clue, can you check the report GENIL_GUI_MODEL_EDITOR if you have the following gui status? maybe there's some which is inactive?
CHANGE Obsolete
CHANGE_SAP Standard Keys
COMP_DETAIL Keys for Component Detail
COMP_SEL Standard Keys
COMP_SEL_SAP Standard Keys
DIALOG_OK_CANCEL Create object for existing relation
DISPLAY_SAP Standard Keys
UML_SETTINGS Create object for existing relation
UML_VIEWER Toolbar for UML Viewer
wierd wierd...