OCannot InsertBefore at list's BeforeFirst position, or InsertAfter at AfterLast;Cannot replace at list's BeforeFirst or AfterLast positions1Already at AfterLast position, Next has no effect3Already at BeforeFirst position, Prev has no effect"Cannot join another container hereFCannot join a data owner to a non-data owner container, and vice versa=Cannot split a list at its BeforeFirst or AfterLast positions(Index is out of the range 0 to (Count-1)5Cannot examine the data in a leaf, it's a nil pointer/The skip level is not between 1 and skMaxLevels
