You receive a DUMP "MESSAGE_TYPE_X" in transaction ST22 or a popup with title "wdttree error" appears.
SAP GUI release independent.
MESSAGE_TYPE_X, Control error, Control Framework, Error processing control, wdttree, Key already used, Relative node for insert not found, Invalid Key, Duplicated Key, Cannot expand leaf , KBA , BC-FES-CTL , SAP GUI for Windows Controls , BC-FES-GUI , Graphical User Interface , Problem
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