--- a/eric6/Debugger/VariablesViewer.py Thu Jul 30 17:57:06 2020 +0200 +++ b/eric6/Debugger/VariablesViewer.py Fri Jul 31 17:16:31 2020 +0200 @@ -810,7 +810,8 @@ self.closedItems.remove(pathlist) self.getMore() else: - self.openItems.remove(pathlist) + if pathlist in self.openItems: + self.openItems.remove(pathlist) self.closedItems.append(pathlist) def __buildTreePath(self, parent):